Question

write a program to input two numbers and swap them without using third variable​

Answer 1

Answer:

We can swap two numbers without using third variable. There are two common ways to swap two numbers without using third variable:

By + and -

By * and /

Answer 2

Explanation:

• Program to swap two numbers without third variable
• #include<stdio.h>
• (int main)
• int a=10, b=20;
• printf("Before swap a=%d b=%d",a,b);
• a=a+b;//a=30 (10+20)
• b=a-b;//b=10 (30-20)
• a=a-b;//a=20 (30-10)