+=   Assignment Operators in C, Subtract AND assignment operator. It subtracts the right operand from the left operand and assigns the result to the left operand.

C Programming Language Operators and Enums in C Language (Article) Operators and Enums in C Language (Program)

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Program:

//Assignment operator 

#include"stdio.h"
void main() {

   int a = 2;
   int c = 12 ;
   c -=  a; // c=c-a c=12-2=10
   printf(" -=  Operator Example\n Value of c = %d \n", c );
}

Output:

 -=  Operator Example
 Value of c = 10
Press any key to continue . . .

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