Using Compound Assignment Operators in C: A Beginner's Guide

An assignment operator is used for assigning a value to a variable. The most common assignment operator is =(equal). The left side operand of the assignment operator is a variable and right side operand of the assignment operator is a value. The value on the right side must be of the same data-type of the variable on the left side otherwise the compiler will raise an error.

Compound Operator	Sample Expression	Expanded Form
+=	a+=5	a=a+5
-=	a-=6	a=a-6
*=	a*=7	a=a*7
/=	a/=4	a=a/4
%=	a%=9	a=a%9

The code is a C program that demonstrates the use of compound assignment operators in C. Here is an explanation of each line of the code:

int a=10,b=5; declares two variables a and b of type int and assigns them the values 10 and 5 respectively.
a+=b; is the compound assignment operator +=, it performs a+b and assigns the value to a. It is equivalent to a=a+b.
printf("A : %d",a); prints the value of a which is 15, this is the result after using += operator.
a-=10; is the compound assignment operator -=, it performs a-10 and assigns the value to a. It is equivalent to a=a-10.
printf("\nA : %d",a); prints the value of a which is 5, this is the result after using -= operator.
return 0; The return 0; statement is used to indicate that the main function has completed successfully. The value 0 is returned as the exit status of the program, which indicates a successful execution.

When you run this code, it will perform the compound assignment operation on variables and print the results in the console.

Source Code

//Assignment operator
 
#include<stdio.h>
int main()
{
    int a=10,b=5;
    //+=
    a+=b; //a=a+5
    printf("A : %d",a); //15
    a-=10; //a=a-10
    printf("\nA : %d",a);
    return 0;
}

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Output

A : 15
A : 5