What does “^L” mean in C?
For example, main in src/hello.c in the GNU Hello package ends like this:
exit (EXIT_SUCCESS);
}
^L
c
edited Mar 17 at 19:24
Peter Mortensen
13.8k1987113
asked Mar 17 at 4:13
Sean LetendreSean Letendre
5311722
|
show 1 more comment
For example, main in src/hello.c in the GNU Hello package ends like this:
exit (EXIT_SUCCESS);
}
^L
c
edited Mar 17 at 19:24
Peter Mortensen
13.8k1987113
asked Mar 17 at 4:13
Sean LetendreSean Letendre
5311722
12
It means that the program's done ... to L with it!
– Hot Licks
Mar 17 at 20:27
I'm wondering though if that is an actual FF and the editor simply shows it like ^L, or if it's the characters "^L". If I were an editor, I'd show an FF like "♀" or "␌".
– Mr Lister
Mar 18 at 7:55
@MrLister: Then you would wonder if it's an actual FF or the characters ♀ or ␌. ;-)
– tomasz
Mar 19 at 12:28
^Lis a Control-L or ASCII FORM FEED, to eject the page. The C compiler normally ignores it, and the editor shows it as shown in your sample.
– Luis Colorado
Mar 20 at 6:29
Possible duplicate of Escape sequence f - form feed - what exactly is it?
– phuclv
Mar 21 at 1:49
|
show 1 more comment
For example, main in src/hello.c in the GNU Hello package ends like this:
exit (EXIT_SUCCESS);
}
^L
c
edited Mar 17 at 19:24
Peter Mortensen
13.8k1987113
asked Mar 17 at 4:13
Sean LetendreSean Letendre
5311722
For example, main in src/hello.c in the GNU Hello package ends like this:
exit (EXIT_SUCCESS);
}
^L
c
c
edited Mar 17 at 19:24
Peter Mortensen
13.8k1987113
asked Mar 17 at 4:13
Sean LetendreSean Letendre
5311722
edited Mar 17 at 19:24
Peter Mortensen
13.8k1987113
asked Mar 17 at 4:13
Sean LetendreSean Letendre
5311722
edited Mar 17 at 19:24
Peter Mortensen
13.8k1987113
edited Mar 17 at 19:24
Peter Mortensen
13.8k1987113
edited Mar 17 at 19:24
Peter Mortensen
13.8k1987113
13.8k1987113
asked Mar 17 at 4:13
Sean LetendreSean Letendre
5311722
asked Mar 17 at 4:13
Sean LetendreSean Letendre
5311722
asked Mar 17 at 4:13
Sean LetendreSean Letendre
5311722
5311722
12
It means that the program's done ... to L with it!
– Hot Licks
Mar 17 at 20:27
I'm wondering though if that is an actual FF and the editor simply shows it like ^L, or if it's the characters "^L". If I were an editor, I'd show an FF like "♀" or "␌".
– Mr Lister
Mar 18 at 7:55
@MrLister: Then you would wonder if it's an actual FF or the characters ♀ or ␌. ;-)
– tomasz
Mar 19 at 12:28
^Lis a Control-L or ASCII FORM FEED, to eject the page. The C compiler normally ignores it, and the editor shows it as shown in your sample.
– Luis Colorado
Mar 20 at 6:29
Possible duplicate of Escape sequence f - form feed - what exactly is it?
– phuclv
Mar 21 at 1:49
|
show 1 more comment
12
It means that the program's done ... to L with it!
– Hot Licks
Mar 17 at 20:27
I'm wondering though if that is an actual FF and the editor simply shows it like ^L, or if it's the characters "^L". If I were an editor, I'd show an FF like "♀" or "␌".
– Mr Lister
Mar 18 at 7:55
@MrLister: Then you would wonder if it's an actual FF or the characters ♀ or ␌. ;-)
– tomasz
Mar 19 at 12:28
^Lis a Control-L or ASCII FORM FEED, to eject the page. The C compiler normally ignores it, and the editor shows it as shown in your sample.
– Luis Colorado
Mar 20 at 6:29
Possible duplicate of Escape sequence f - form feed - what exactly is it?
– phuclv
Mar 21 at 1:49
12
12
It means that the program's done ... to L with it!
– Hot Licks
Mar 17 at 20:27
It means that the program's done ... to L with it!
– Hot Licks
Mar 17 at 20:27
I'm wondering though if that is an actual FF and the editor simply shows it like ^L, or if it's the characters "^L". If I were an editor, I'd show an FF like "♀" or "␌".
– Mr Lister
Mar 18 at 7:55
I'm wondering though if that is an actual FF and the editor simply shows it like ^L, or if it's the characters "^L". If I were an editor, I'd show an FF like "♀" or "␌".
– Mr Lister
Mar 18 at 7:55
@MrLister: Then you would wonder if it's an actual FF or the characters ♀ or ␌. ;-)
– tomasz
Mar 19 at 12:28
@MrLister: Then you would wonder if it's an actual FF or the characters ♀ or ␌. ;-)
– tomasz
Mar 19 at 12:28
^L is a Control-L or ASCII FORM FEED, to eject the page. The C compiler normally ignores it, and the editor shows it as shown in your sample.– Luis Colorado
Mar 20 at 6:29
^L is a Control-L or ASCII FORM FEED, to eject the page. The C compiler normally ignores it, and the editor shows it as shown in your sample.– Luis Colorado
Mar 20 at 6:29
Possible duplicate of Escape sequence f - form feed - what exactly is it?
– phuclv
Mar 21 at 1:49
Possible duplicate of Escape sequence f - form feed - what exactly is it?
– phuclv
Mar 21 at 1:49
|
show 1 more comment
2 Answers
2
active
oldest
votes
Literally, it's a page break ("form feed") character. The compiler treats it as ordinary whitespace. But it's very useful for printing source code - it starts a new page (for example, use ^L between functions to force each call to get its own page).
In Vim/vi based editors, you can insert such a character within edit mode by typing Ctrl + V followed by Ctrl + L. It will look like ^L in the editor, but it's actually just one character (ASCII value: 12 or 0x0C).
edited Mar 17 at 19:26
Peter Mortensen
13.8k1987113
answered Mar 17 at 4:16
selbieselbie
56.7k1064124
7
If you would print the source code on paper, the printer would… start a new page.
– Hermann
Mar 17 at 18:11
7
Literally this
– selbie
Mar 17 at 18:11
13
@Croll Obviously that's been a short life. You've never had to deal with hundreds of pages of listing s from a line printer. You'd use it all right.
– user207421
Mar 17 at 19:49
4
@Croll Well, it's hardly the first time someone's used whitespace to make code format nicely, is it?
– naomimyselfandi
Mar 17 at 19:53
2
@user207421 - I can remember the good ole days, when, if the compiler wasn't smart enough to automatically do it at the start of a procedure you'd insert@ejector some such, to get to the top of the next neatly folded page of form-feed paper. Made reviewing code much easier.
– Hot Licks
Mar 17 at 20:30
|
show 6 more comments
it is also called form feed.It is a page-breaking ASCII control character. It forces the printer to eject the current page and to continue printing at the top of another. It will also cause a carriage return. The form feed character code is defined as 12
(0xC in hexadecimal)
answered Mar 22 at 13:42
dark_3nergydark_3nergy
628
add a comment |
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2 Answers
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2 Answers
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oldest
votes
Literally, it's a page break ("form feed") character. The compiler treats it as ordinary whitespace. But it's very useful for printing source code - it starts a new page (for example, use ^L between functions to force each call to get its own page).
In Vim/vi based editors, you can insert such a character within edit mode by typing Ctrl + V followed by Ctrl + L. It will look like ^L in the editor, but it's actually just one character (ASCII value: 12 or 0x0C).
edited Mar 17 at 19:26
Peter Mortensen
13.8k1987113
answered Mar 17 at 4:16
selbieselbie
56.7k1064124
7
If you would print the source code on paper, the printer would… start a new page.
– Hermann
Mar 17 at 18:11
7
Literally this
– selbie
Mar 17 at 18:11
13
@Croll Obviously that's been a short life. You've never had to deal with hundreds of pages of listing s from a line printer. You'd use it all right.
– user207421
Mar 17 at 19:49
4
@Croll Well, it's hardly the first time someone's used whitespace to make code format nicely, is it?
– naomimyselfandi
Mar 17 at 19:53
2
@user207421 - I can remember the good ole days, when, if the compiler wasn't smart enough to automatically do it at the start of a procedure you'd insert@ejector some such, to get to the top of the next neatly folded page of form-feed paper. Made reviewing code much easier.
– Hot Licks
Mar 17 at 20:30
|
show 6 more comments
Literally, it's a page break ("form feed") character. The compiler treats it as ordinary whitespace. But it's very useful for printing source code - it starts a new page (for example, use ^L between functions to force each call to get its own page).
In Vim/vi based editors, you can insert such a character within edit mode by typing Ctrl + V followed by Ctrl + L. It will look like ^L in the editor, but it's actually just one character (ASCII value: 12 or 0x0C).
edited Mar 17 at 19:26
Peter Mortensen
13.8k1987113
answered Mar 17 at 4:16
selbieselbie
56.7k1064124
7
If you would print the source code on paper, the printer would… start a new page.
– Hermann
Mar 17 at 18:11
7
Literally this
– selbie
Mar 17 at 18:11
13
@Croll Obviously that's been a short life. You've never had to deal with hundreds of pages of listing s from a line printer. You'd use it all right.
– user207421
Mar 17 at 19:49
4
@Croll Well, it's hardly the first time someone's used whitespace to make code format nicely, is it?
– naomimyselfandi
Mar 17 at 19:53
2
@user207421 - I can remember the good ole days, when, if the compiler wasn't smart enough to automatically do it at the start of a procedure you'd insert@ejector some such, to get to the top of the next neatly folded page of form-feed paper. Made reviewing code much easier.
– Hot Licks
Mar 17 at 20:30
|
show 6 more comments
Literally, it's a page break ("form feed") character. The compiler treats it as ordinary whitespace. But it's very useful for printing source code - it starts a new page (for example, use ^L between functions to force each call to get its own page).
In Vim/vi based editors, you can insert such a character within edit mode by typing Ctrl + V followed by Ctrl + L. It will look like ^L in the editor, but it's actually just one character (ASCII value: 12 or 0x0C).
edited Mar 17 at 19:26
Peter Mortensen
13.8k1987113
answered Mar 17 at 4:16
selbieselbie
56.7k1064124
Literally, it's a page break ("form feed") character. The compiler treats it as ordinary whitespace. But it's very useful for printing source code - it starts a new page (for example, use ^L between functions to force each call to get its own page).
In Vim/vi based editors, you can insert such a character within edit mode by typing Ctrl + V followed by Ctrl + L. It will look like ^L in the editor, but it's actually just one character (ASCII value: 12 or 0x0C).
edited Mar 17 at 19:26
Peter Mortensen
13.8k1987113
answered Mar 17 at 4:16
selbieselbie
56.7k1064124
edited Mar 17 at 19:26
Peter Mortensen
13.8k1987113
edited Mar 17 at 19:26
Peter Mortensen
13.8k1987113
edited Mar 17 at 19:26
Peter Mortensen
13.8k1987113
13.8k1987113
answered Mar 17 at 4:16
selbieselbie
56.7k1064124
answered Mar 17 at 4:16
selbieselbie
56.7k1064124
answered Mar 17 at 4:16
selbieselbie
56.7k1064124
56.7k1064124
7
If you would print the source code on paper, the printer would… start a new page.
– Hermann
Mar 17 at 18:11
7
Literally this
– selbie
Mar 17 at 18:11
13
@Croll Obviously that's been a short life. You've never had to deal with hundreds of pages of listing s from a line printer. You'd use it all right.
– user207421
Mar 17 at 19:49
4
@Croll Well, it's hardly the first time someone's used whitespace to make code format nicely, is it?
– naomimyselfandi
Mar 17 at 19:53
2
@user207421 - I can remember the good ole days, when, if the compiler wasn't smart enough to automatically do it at the start of a procedure you'd insert@ejector some such, to get to the top of the next neatly folded page of form-feed paper. Made reviewing code much easier.
– Hot Licks
Mar 17 at 20:30
|
show 6 more comments
7
If you would print the source code on paper, the printer would… start a new page.
– Hermann
Mar 17 at 18:11
7
Literally this
– selbie
Mar 17 at 18:11
13
@Croll Obviously that's been a short life. You've never had to deal with hundreds of pages of listing s from a line printer. You'd use it all right.
– user207421
Mar 17 at 19:49
4
@Croll Well, it's hardly the first time someone's used whitespace to make code format nicely, is it?
– naomimyselfandi
Mar 17 at 19:53
2
@user207421 - I can remember the good ole days, when, if the compiler wasn't smart enough to automatically do it at the start of a procedure you'd insert@ejector some such, to get to the top of the next neatly folded page of form-feed paper. Made reviewing code much easier.
– Hot Licks
Mar 17 at 20:30
7
7
If you would print the source code on paper, the printer would… start a new page.
– Hermann
Mar 17 at 18:11
If you would print the source code on paper, the printer would… start a new page.
– Hermann
Mar 17 at 18:11
7
7
Literally this
– selbie
Mar 17 at 18:11
Literally this
– selbie
Mar 17 at 18:11
13
13
@Croll Obviously that's been a short life. You've never had to deal with hundreds of pages of listing s from a line printer. You'd use it all right.
– user207421
Mar 17 at 19:49
@Croll Obviously that's been a short life. You've never had to deal with hundreds of pages of listing s from a line printer. You'd use it all right.
– user207421
Mar 17 at 19:49
4
4
@Croll Well, it's hardly the first time someone's used whitespace to make code format nicely, is it?
– naomimyselfandi
Mar 17 at 19:53
@Croll Well, it's hardly the first time someone's used whitespace to make code format nicely, is it?
– naomimyselfandi
Mar 17 at 19:53
2
2
@user207421 - I can remember the good ole days, when, if the compiler wasn't smart enough to automatically do it at the start of a procedure you'd insert
@eject or some such, to get to the top of the next neatly folded page of form-feed paper. Made reviewing code much easier.– Hot Licks
Mar 17 at 20:30
@user207421 - I can remember the good ole days, when, if the compiler wasn't smart enough to automatically do it at the start of a procedure you'd insert
@eject or some such, to get to the top of the next neatly folded page of form-feed paper. Made reviewing code much easier.– Hot Licks
Mar 17 at 20:30
|
show 6 more comments
it is also called form feed.It is a page-breaking ASCII control character. It forces the printer to eject the current page and to continue printing at the top of another. It will also cause a carriage return. The form feed character code is defined as 12
(0xC in hexadecimal)
answered Mar 22 at 13:42
dark_3nergydark_3nergy
628
add a comment |
it is also called form feed.It is a page-breaking ASCII control character. It forces the printer to eject the current page and to continue printing at the top of another. It will also cause a carriage return. The form feed character code is defined as 12
(0xC in hexadecimal)
answered Mar 22 at 13:42
dark_3nergydark_3nergy
628
add a comment |
it is also called form feed.It is a page-breaking ASCII control character. It forces the printer to eject the current page and to continue printing at the top of another. It will also cause a carriage return. The form feed character code is defined as 12
(0xC in hexadecimal)
answered Mar 22 at 13:42
dark_3nergydark_3nergy
628
it is also called form feed.It is a page-breaking ASCII control character. It forces the printer to eject the current page and to continue printing at the top of another. It will also cause a carriage return. The form feed character code is defined as 12
(0xC in hexadecimal)
answered Mar 22 at 13:42
dark_3nergydark_3nergy
628
answered Mar 22 at 13:42
dark_3nergydark_3nergy
628
answered Mar 22 at 13:42
dark_3nergydark_3nergy
628
answered Mar 22 at 13:42
dark_3nergydark_3nergy
628
628
add a comment |
add a comment |
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12
It means that the program's done ... to L with it!
– Hot Licks
Mar 17 at 20:27
I'm wondering though if that is an actual FF and the editor simply shows it like ^L, or if it's the characters "^L". If I were an editor, I'd show an FF like "♀" or "␌".
– Mr Lister
Mar 18 at 7:55
@MrLister: Then you would wonder if it's an actual FF or the characters ♀ or ␌. ;-)
– tomasz
Mar 19 at 12:28
^Lis a Control-L or ASCII FORM FEED, to eject the page. The C compiler normally ignores it, and the editor shows it as shown in your sample.– Luis Colorado
Mar 20 at 6:29
Possible duplicate of Escape sequence f - form feed - what exactly is it?
– phuclv
Mar 21 at 1:49