def count_up(num):
i = 1
while i <= num:
print(i)
i += 1
Below is the now familiar count_up function written using a while loop. Unlike the for loop, while does not have a built-in index variable (but we can easily define our own using the variable i below).
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The while loop is analogous to the repeat until loop in Snap! However, in Python the loop ends when the condition becomes False (so you can think of a while loop as "repeat the code in the loop while True"). This is the opposite of Snap!'s repeat until loop, which waits for its condition to become True.