C Basics - Arithmetic Operators in C

The following table shows all the arithmetic operators supported by the C language. Assume variable x holds 21, y holds 10 and variable z holds 0 then.

Operator Name		Syntax	Description	Example
Direct assignment		x = y	Assigns values from right side operands to left side operand	z = x; z = 21
Addition		x + y	Adds two operands.	z = x + y; z = 31
Subtraction		x - y	Subtracts second operand from the first.	z = x – y; z = 11
Multiplication		x * y	Multiplies both operands.	z = x * y; z = 210
Division		x / y	Divides numerator by de-numerator.	z = x / y; z = 2
Modulo		x % y	Modulus Operator and remainder of after an integer division.	z = x % y; z = 1
Increment	Prefix	++x	Increment operator increases the integer value by one.	z = ++x; z = 22
	Postfix	x++		z = x++; z = 21
Decrement	Prefix	--x	Decrement operator decreases the integer value by one.	z = --x; z = 20
	Postfix	x--		z = x--; z = 21
Unary plus		+x	Integer promotion. Operates on single operand	z = +x; z = 21
Unary minus		-x	Additive inverse. Operates on single operand	z = -x; z = -21

#include <stdio.h>

int main() 
{
 int x = 21;
 int y = 10;
 int z = 0;
    
 printf("Arithmetic operators demo\n");
 printf("Value of x is %d\n", x );
 printf("Value of y is %d\n", y );
 printf("Value of z is %d\n", z ); 
   
  z = x;
 printf("Direct Assignment (z = x): %d\n", z );
 
 z = x + y;
 printf("Addition (z = x + y): %d\n", z );
 
 z = x - y;
 printf("Subtraction (z = x - y): %d\n", z );
 
 z = x * y;
 printf("Multiplication (z = x * y): %d\n", z );
 
 z = x / y;
 printf("Division (z = x / y): %d\n", z );
 
 z = x % y;
 printf("Modulo  (z = x mod y): %d\n", z );
 
 z = ++x;
 printf("PreIncrement (z = ++x): %d\n", z );
 
 x = 21;
 z = x++;
 printf("PostIncrement (z = x++): %d\n", z );
 
 x = 21;
 z = --x;
 printf("PreDecrement (z = --x): %d\n", z );
 
 x = 21;
 z = x--;
 printf("PostDecrement (z = x--): %d\n", z );
 
 x = 21;
 z = +x;
 printf("Unary plus (z = +x): %d\n", z );

 z = -x;
 printf("Unary minus (z = -x): %d\n", z );   

    return 0;
}

The output of the above program would be:

Arithmetic operators demo
Value of x is 21
Value of y is 10
Value of z is 0
Direct Assignment (z = x): 21
Addition (z = x + y): 31
Subtraction (z = x - y): 11
Multiplication (z = x * y): 210
Division (z = x / y): 2
Modulo  (z = x mod y): 1
PreIncrement (z = ++x): 22
PostIncrement (z = x++): 21
PreDecrement (z = --x): 20
PostDecrement (z = x--): 21
Unary plus (z = +x): 21
Unary minus (z = -x): -21

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Related topics:
Overview of Operators in C   |   Relational Operators in C   |   Logical Operators in C   |   Bitwise Operators in C   |   Compound Assignment Operators in C   |   Conditional Operators in C   |   Miscellaneous Operators in C   |   Operator Precedence and Associativity in C

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List of topics: C Programming

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