What's the difference between using range() and not using it in a for loop?

-4

I have this:

colors = ["blue","brown","red","yellow","green"]

for color in colors:

for index in range(len(colors)):

what is the difference between using 1 and 2 ?

edited Nov 21 '18 at 22:51

Vasilis G.

3,9742924

asked Nov 21 '18 at 22:41

Deepstrings

2

Do you get the same result when running each line? If not, there is your difference.

– usr2564301
Nov 21 '18 at 22:42

add a comment |

-4

I have this:

colors = ["blue","brown","red","yellow","green"]

for color in colors:

for index in range(len(colors)):

what is the difference between using 1 and 2 ?

edited Nov 21 '18 at 22:51

Vasilis G.

3,9742924

asked Nov 21 '18 at 22:41

Deepstrings

2

Do you get the same result when running each line? If not, there is your difference.

– usr2564301
Nov 21 '18 at 22:42

add a comment |

-4

I have this:

colors = ["blue","brown","red","yellow","green"]

for color in colors:

for index in range(len(colors)):

what is the difference between using 1 and 2 ?

edited Nov 21 '18 at 22:51

Vasilis G.

3,9742924

asked Nov 21 '18 at 22:41

Deepstrings

I have this:

colors = ["blue","brown","red","yellow","green"]

for color in colors:

for index in range(len(colors)):

what is the difference between using 1 and 2 ?

python for-loop range element

edited Nov 21 '18 at 22:51

Vasilis G.

3,9742924

asked Nov 21 '18 at 22:41

Deepstrings

edited Nov 21 '18 at 22:51

Vasilis G.

3,9742924

asked Nov 21 '18 at 22:41

Deepstrings

edited Nov 21 '18 at 22:51

Vasilis G.

3,9742924

edited Nov 21 '18 at 22:51

Vasilis G.

3,9742924

edited Nov 21 '18 at 22:51

Vasilis G.

3,9742924

asked Nov 21 '18 at 22:41

Deepstrings

asked Nov 21 '18 at 22:41

Deepstrings

asked Nov 21 '18 at 22:41

Deepstrings

2

Do you get the same result when running each line? If not, there is your difference.

– usr2564301
Nov 21 '18 at 22:42

add a comment |

2

Do you get the same result when running each line? If not, there is your difference.

– usr2564301
Nov 21 '18 at 22:42

Do you get the same result when running each line? If not, there is your difference.

– usr2564301
Nov 21 '18 at 22:42

add a comment |

2 Answers
2

active

oldest

votes

When you say for color in colors: you are iterating over the items in the list.

for color in colors:

    print(color)



>>> "blue"

>>> "brown"

>>> "red"

>>> "yellow"

>>> "green"

If you iterate over indices you get:

for index in range(len(colors)):

    print(index)



>>> 0

>>> 1

>>> 2

>>> 3

>>> 4

You can get the two version together by using enumerate:

for c, color in enumerate(colors):

    print(c, color)



>>> 0 "blue"

>>> 1 "brown"

>>> 2 "red"

>>> 3 "yellow"

>>> 4 "green"

edited Nov 21 '18 at 22:45

answered Nov 21 '18 at 22:43

berkelem

9632721

And you can get both with for index, color in enumerate(colors)

– cricket_007
Nov 21 '18 at 22:45

add a comment |

With the first one you'll have access to local variable color within loop. It's also considered more pythonic.

With the second one you'll have access to the index instead which might be useful.

I'm not aware of performance difference but someone might be.

answered Nov 21 '18 at 22:43

kabdulla

2,3271725

add a comment |

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2 Answers
2

active

oldest

votes

2 Answers
2

active

oldest

votes

When you say for color in colors: you are iterating over the items in the list.

for color in colors:

    print(color)



>>> "blue"

>>> "brown"

>>> "red"

>>> "yellow"

>>> "green"

If you iterate over indices you get:

for index in range(len(colors)):

    print(index)



>>> 0

>>> 1

>>> 2

>>> 3

>>> 4

You can get the two version together by using enumerate:

for c, color in enumerate(colors):

    print(c, color)



>>> 0 "blue"

>>> 1 "brown"

>>> 2 "red"

>>> 3 "yellow"

>>> 4 "green"

edited Nov 21 '18 at 22:45

answered Nov 21 '18 at 22:43

berkelem

9632721

And you can get both with for index, color in enumerate(colors)

– cricket_007
Nov 21 '18 at 22:45

add a comment |

When you say for color in colors: you are iterating over the items in the list.

for color in colors:

    print(color)



>>> "blue"

>>> "brown"

>>> "red"

>>> "yellow"

>>> "green"

If you iterate over indices you get:

for index in range(len(colors)):

    print(index)



>>> 0

>>> 1

>>> 2

>>> 3

>>> 4

You can get the two version together by using enumerate:

for c, color in enumerate(colors):

    print(c, color)



>>> 0 "blue"

>>> 1 "brown"

>>> 2 "red"

>>> 3 "yellow"

>>> 4 "green"

edited Nov 21 '18 at 22:45

answered Nov 21 '18 at 22:43

berkelem

9632721

And you can get both with for index, color in enumerate(colors)

– cricket_007
Nov 21 '18 at 22:45

add a comment |

When you say for color in colors: you are iterating over the items in the list.

for color in colors:

    print(color)



>>> "blue"

>>> "brown"

>>> "red"

>>> "yellow"

>>> "green"

If you iterate over indices you get:

for index in range(len(colors)):

    print(index)



>>> 0

>>> 1

>>> 2

>>> 3

>>> 4

You can get the two version together by using enumerate:

for c, color in enumerate(colors):

    print(c, color)



>>> 0 "blue"

>>> 1 "brown"

>>> 2 "red"

>>> 3 "yellow"

>>> 4 "green"

edited Nov 21 '18 at 22:45

answered Nov 21 '18 at 22:43

berkelem

9632721

When you say for color in colors: you are iterating over the items in the list.

for color in colors:

    print(color)



>>> "blue"

>>> "brown"

>>> "red"

>>> "yellow"

>>> "green"

If you iterate over indices you get:

for index in range(len(colors)):

    print(index)



>>> 0

>>> 1

>>> 2

>>> 3

>>> 4

You can get the two version together by using enumerate:

for c, color in enumerate(colors):

    print(c, color)



>>> 0 "blue"

>>> 1 "brown"

>>> 2 "red"

>>> 3 "yellow"

>>> 4 "green"

edited Nov 21 '18 at 22:45

answered Nov 21 '18 at 22:43

berkelem

9632721

edited Nov 21 '18 at 22:45

answered Nov 21 '18 at 22:43

berkelem

9632721

answered Nov 21 '18 at 22:43

berkelem

9632721

answered Nov 21 '18 at 22:43

berkelem

9632721

And you can get both with for index, color in enumerate(colors)

– cricket_007
Nov 21 '18 at 22:45

add a comment |

And you can get both with for index, color in enumerate(colors)

– cricket_007
Nov 21 '18 at 22:45

And you can get both with for index, color in enumerate(colors)

– cricket_007
Nov 21 '18 at 22:45

add a comment |

With the first one you'll have access to local variable color within loop. It's also considered more pythonic.

With the second one you'll have access to the index instead which might be useful.

I'm not aware of performance difference but someone might be.

answered Nov 21 '18 at 22:43

kabdulla

2,3271725

add a comment |

With the first one you'll have access to local variable color within loop. It's also considered more pythonic.

With the second one you'll have access to the index instead which might be useful.

I'm not aware of performance difference but someone might be.

answered Nov 21 '18 at 22:43

kabdulla

2,3271725

add a comment |

With the first one you'll have access to local variable color within loop. It's also considered more pythonic.

With the second one you'll have access to the index instead which might be useful.

I'm not aware of performance difference but someone might be.

answered Nov 21 '18 at 22:43

kabdulla

2,3271725

With the first one you'll have access to local variable color within loop. It's also considered more pythonic.

With the second one you'll have access to the index instead which might be useful.

I'm not aware of performance difference but someone might be.

answered Nov 21 '18 at 22:43

kabdulla

2,3271725

answered Nov 21 '18 at 22:43

kabdulla

2,3271725

answered Nov 21 '18 at 22:43

kabdulla

2,3271725

answered Nov 21 '18 at 22:43

kabdulla

2,3271725

add a comment |

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