Loops

Loops let you run the same code multiple times. Instead of writing print() ten times, you write it once inside a loop.

What you'll learn

• for loops to iterate a known number of times
• range() to generate sequences of numbers
• while loops for condition-based repetition
• break and continue for loop control

Instructions

1. Write a for loop that prints the multiplication table for a number read from stdin.
2. Print each line as: "N x i = result" for i from 1 to 10.

Bonus challenge

3. After the table, use a while loop to find the smallest power of 2 that is greater than the input number. Print it. (This part is optional — try it once your for loop works!)

Example output for input 7:

7 x 1 = 7
7 x 2 = 14
7 x 3 = 21
7 x 4 = 28
7 x 5 = 35
7 x 6 = 42
7 x 7 = 49
7 x 8 = 56
7 x 9 = 63
7 x 10 = 70
Smallest power of 2 greater than 7: 8

Key concepts

for loop with range():

for i in range(1, 11):    # i = 1, 2, 3, ..., 10
    print(i)

range(start, stop) generates numbers from start up to (but not including) stop.

while loop runs as long as its condition is true:

power = 1
while power <= n:
    power = power * 2

break exits the loop immediately. continue skips to the next iteration.

Hints

• range(1, 11) gives you 1 through 10 (the stop value is exclusive).
• For the power-of-2 part, start at 1 and keep doubling until you exceed the input.
• Make sure your while loop has a condition that eventually becomes false — otherwise it runs forever.