Control flow · Lesson 9 of 25

Loops: for and while

range, and looping over things.

8 minutes3 games

for loops over anything with items. range(5) gives 0 to 4 and range(1, 6) gives 1 to 5. while repeats while its condition is true.

Python

for i in range(1, 4):
    print("Round", i)

for letter in "abc":
    print(letter.upper())

count = 3
while count > 0:
    print(count)
    count -= 1
print("Go!")

Step by step1 / 6

▶total = 0
2for n in range(1, 3):
3 total += n
4print(total)

Variables

total

Output

…

What's the output?

for i in range(3):
    print(i)

What will this code print?

Complete the code

Print the numbers 1 to 10.

for n in range(, ):
    print(n)

Exercise

Print the sum of 1 to 100 (the result is 5050).

Expected output: 5050

Python

total = 0

Learn more from

Played 0 of 3 games

Python

Control flow · Lesson 9 of 25

Loops: for and while

range, and looping over things.

8 minutes3 games

for loops over anything with items. range(5) gives 0 to 4 and range(1, 6) gives 1 to 5. while repeats while its condition is true.

Python

for i in range(1, 4):
    print("Round", i)

for letter in "abc":
    print(letter.upper())

count = 3
while count > 0:
    print(count)
    count -= 1
print("Go!")

Step by step1 / 6

▶total = 0
2for n in range(1, 3):
3 total += n
4print(total)

Variables

total

Output

…

What's the output?

for i in range(3):
    print(i)

What will this code print?

Complete the code

Print the numbers 1 to 10.

for n in range(, ):
    print(n)

Exercise

Print the sum of 1 to 100 (the result is 5050).

Expected output: 5050

Python

total = 0

Learn more from

Played 0 of 3 games