Output is 5. Anyone knows how.?

Question

int a = 1

while(a++<=1)
while(a++ <= 2);

cout<< a;

Answer 1

This is how the program executes:

Outer loop:
a++ <= 1 -> true
a = 2

Inner loop:
a++ <= 2 -> true
a = 3

a++ <= 2 -> false
a = 4, since it was still incremented during the condition

Inner loop terminates.

Outer loop:
a++ <= 1 -> false
a = 5, same as above

Outer loop terminates.

Keep in mind 'a' will be incremented once more even if the condition evaluates to false and the loop terminates.

Answer 2

Excellent explanation Shadow 👍👍👍