# Conditional Statement Practice-----Problem 16 -------2 distinct number whose value=100

I don’t understand the working of the solution code (2 for loop )
My Code:

``````values = [72, 50, 48, 50, 7, 66, 62, 32, 33, 75, 30, 85, 6, 85, 82, 88, 30, 32, 78, 39, 57, 96, 45, 57, 61, 10, 62, 48, 32, 96, 75, 15, 50, 50]
value1 = None
value2 = None
for x in values:
for y in values:
if x + y == 100 and x != y:
value1 = x
value2 = y
``````

What I expected to happen:
In the first iteration, I expect, x=72, y=72. in the second x=50, y=50. So essentially both x and y have the same values. Am I missing something?

What actually happened:

``````Replace this line with the output/error
``````

You have a nested for loop here. Both of them don’t run simultaneously.

• First for loop, iteration `1`: `x = 72`.

• Second for loop, iteration `1`: `x = 72`, `y = 72`
• Second for loop, iteration `2`: `x = 72`, `y = 50`
• Second for loop, iteration `3`: `x = 72`, `y = 48`
• and more iterations
• Second for loop, last iteration: `x = 72`, `y = 50`
• First for loop, iteration `2`: `x = 50`

• Second for loop, iteration `1`: `x = 50`, `y = 72`
• Second for loop, iteration `2`: `x = 50`, `y = 50`
• Second for loop, iteration `3`: `x = 50`, `y = 48`
• and more iterations
• Second for loop, last iteration: `x = 50`, `y = 50`
• First for loop, iteration `3`: `x = 48`, and so on.

For every iteration of the outer loop, the inner loop will go through all of its iterations.

1 Like

Thank you so much! That’s really very helpful!! 