Unary Operators

Unary Operators

There are two Unary Operators. They are Increment and Decrement.

Increment Unary Operator

variable++

++variable;

Is Equivalent i=i+1 or i+=1

Increment Unary Operator Types

• Post Increment i++
• Pre Increment ++i

Decrement Unary Operator

variable--;

--variable;

Is Equivalent i=i-1 or i-=1

Decrement Unary Operator Types

• Post Decrement i—
• Pre Decrement —i

Unary Operators Explanation

• ++i : increments l and then uses its value as the value of the expression;
• i++ : uses l as the value of the expression and then increments l;
• —i :decrements l and then uses its value as the value of the expression;
• i— : uses l as the value of the expression and then decrements l.
• Change their original value.

Example Program For Unary Operators

/*  Example Program For Unary Operators Example In C Programming Language
    little drops @ thiyagaraaj.com
    Coded By:THIYAGARAAJ MP             */

// Header Files
#include<stdio.h>
#include<conio.h>

//Main Function
int main()
{
     // Variable Declaration
	int a;

     //Get Input Value
    /* Increment Operators */
	a = 5;
	printf("Post Increment = %d\n",a++);

	a = 5;
	printf("Pre Increment = %d\n",++a);

  /* Decrement Operators */
	a = 5;
	printf("Post Decrement = %d\n",a--);

	a = 5;
	printf("Pre Decrement = %d\n",--a);

     // Wait For Output Screen
     getch();

     //Main Function return Statement
     return 0;
}

Sample Output:

Post Increment = 5

Pre Increment = 6

Post Decrement = 5

Pre Decrement = 4

Related Pages

Continue learning with these related tutorials and programs:

• C Tutorials — Browse all C Tutorials.
• C Operators — Overview — all C operator categories.
• Arithmetic Operator Example Program In C — More in c operators.
• Relational Operators — More in c operators.