range()
range()
is a special function that generates range of numbers. range()
has three parameters:
range(start, end, step)
- returns the numbers starting from start
up to end
(exclusive) with the step step
.
Examples
range(1, 10, 1)
: returns (1, 2, 3, 4, 5, 6, 7, 8, 9).
range(-3, 4, 3)
: returns (-3, 0, 3).
range(22, 22, 1)
: returns empty range.
You can also use such a range()
functions:
range(end)
: the shorter version ofrange(0, end, 1)
range(start, end)
: the shorter version ofrange(start, end, 1)
.
Run the following examples to see the loop iteration.
12345678for i in range(8): print(i) for i in range(7, -1, -1): print(i) for i in range(1, 11, 2): print(i)
Using range()
in for
loop condition helps to specify the start
and end
conditions, however set a step
. By the way, variable that stores the value (here is an i
) shouldn't be defined before the loop. It exists only inside the loop.
Negative step
What happens if pass negative value of step? Actually, still the same: generates range of numbers starting with start
decreasing down to end
(still exclusive). The code to generate odd numbers between 8 and 20 in descending order:
12for i in range(20, 8, -2): print(i)
Swipe to start coding
Output the list in reverse order using for
loop and range()
: iterate from the last symbol to the first one. Output each symbol separately on each line.
Solution
Merci pour vos commentaires !
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range()
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range()
is a special function that generates range of numbers. range()
has three parameters:
range(start, end, step)
- returns the numbers starting from start
up to end
(exclusive) with the step step
.
Examples
range(1, 10, 1)
: returns (1, 2, 3, 4, 5, 6, 7, 8, 9).
range(-3, 4, 3)
: returns (-3, 0, 3).
range(22, 22, 1)
: returns empty range.
You can also use such a range()
functions:
range(end)
: the shorter version ofrange(0, end, 1)
range(start, end)
: the shorter version ofrange(start, end, 1)
.
Run the following examples to see the loop iteration.
12345678for i in range(8): print(i) for i in range(7, -1, -1): print(i) for i in range(1, 11, 2): print(i)
Using range()
in for
loop condition helps to specify the start
and end
conditions, however set a step
. By the way, variable that stores the value (here is an i
) shouldn't be defined before the loop. It exists only inside the loop.
Negative step
What happens if pass negative value of step? Actually, still the same: generates range of numbers starting with start
decreasing down to end
(still exclusive). The code to generate odd numbers between 8 and 20 in descending order:
12for i in range(20, 8, -2): print(i)
Swipe to start coding
Output the list in reverse order using for
loop and range()
: iterate from the last symbol to the first one. Output each symbol separately on each line.
Solution
Merci pour vos commentaires !
Awesome!
Completion rate improved to 6.25single