Beginner · For loops · 74 of 264
Table of squares
Read n and print, for every number from 1 to n, the number and its square.
Input: a positive whole number n. Output: n lines like 4 16
Examples
Input
4
Output
1 1 2 4 3 9 4 16
Input
1
Output
1 1
One more test checks other inputs when you press Check.
Stuck? The idea behind for loops
A for loop repeats its indented lines once for each item: each letter of a string, each item of a list, or each number of a range.
range(5) is 0 to 4; range(1, 6) is 1 to 5; range(10, 0, -1) counts down from 10 to 1.
total = 0
for i in range(1, 6):
total += i
print(total) # 15Watch for: range stops before its end: range(1, n) leaves out n. A print inside the loop prints every time; outside it (not indented), once at the end.