Today lets learn how to swap 2 integer numbers without using a temporary variable in C. We’re using arithmetic operation in our logic. We’re using addition and subtraction in this c program to swap the 2 numbers.
#include < stdio.h > int main() { int x = 10, y = 5; printf("Before swapping x = %d and y = %d\n", x, y); x = x + y - ( y = x ); printf("After swapping x = %d and y = %d\n", x, y); return 0; }
Output:
Before swapping x = 10 and y = 5
After swapping x = 5 and y = 10
Swap 2 Numbers Without Using a Temporary Variable: C
[youtube https://www.youtube.com/watch?v=tTzdGK5t-X4]
Swapping 2 Numbers In C using addition, subtraction and assignment operators: Logic
Here we take 2 variables, x and y; We store 10 in x and 5 in y.
We add the values of x(10) and y(5) and then subtract the value returned when we assign x value to y.
Note: When we assign a value to a variable, the same value is returned.
Ex: temp = (a = 10);
In this statement, when we assign 10 to a, the whole expression returns 10 and we can store it in variable temp, for our reference.