Operators in C programming language [ Part-1 ]

An operator in C programming language is simply a symbol that is used to perform different types of  operations. There are following types of operators to perform different types of operations in C language.

• Arithmetic Operators
• Relational Operators
• Logical Operators
• Bitwise Operators
• Assignment Operators
• Misc Operators

Arithmetic Operators : The following table shows all the arithmetic operators supported by the C language. Assume variable A holds 10 and variable B holds 20, then :

Operators	Description	Examples
+	Adds two operands	A + B = 30
-	Subtracts second operand from the first	A - B = -10
*	Multiplies both operands	A * B = 200
/	Divides numerator by de-numerator	B/A = 2
%	Modulus Operator and remainder of after an integer division	B % A = 0
++	Increment operator increases the integer value by one	A++ = 11
--	Decrement operator decrease the integer value by one	A-- = 9

Example :

#include<stdio.h>
int main()
{
      int a=10, b=5;
      printf("Sum = %d\n",a+b);
      printf("Subtract = %d\n",a-b);
      printf("Multiplication = %d\n",a*b);
      printf("Division = %d\n",a/b);
      return 0;
}

Output :

Sum = 15
Subtract = 5
Multiplication = 50
Division = 2

Relational Operators : The following table shows all the relational operators supported by C. Assume variable A holds 10 and variable B holds 20, then :

Operators	Description	Examples
==	Checks if the values of two operands are equal or not. If yes, then the condition becomes true.	(A == B) is not true.
!=	Checks if the values of two operands are equal or not. If the values are not equal, then the condition becomes true.	(A != B) is true.
>	Checks if the value of left operand is greater than the value of right operand. If yes, then the condition becomes true.	(A > B) is not true.
<	Checks if the value of left operand is less than the value of right operand. If yes, then the condition becomes true.	(A < B) is true
>=	Checks if the value of left operand is greater than or equal to the value of right operand. If yes, then the condition becomes true.	(A >= B) is not true
<=	Checks if the value of left operand is less than or equal to the value of right operand. If yes, then the condition becomes true.	(A <= B) is true

Example :

#include <stdio.h>
int main()
{
      int a=10, b=5;
      if(a==b)
      {
            printf("%d is equal to %d\n",a,b);
      }
      else
      {
            printf("%d is not equal to %d\n",a,b);
      }
      if(a>b)
      {
            printf("%d is greater than %d\n",a,b);
       }
      else
      {
            printf("%d is not greater than %d\n",a,b);
      }
      if(a<b)
      {
            printf("%d is less than %d\n",a,b);
      }
      else
      {
            printf("%d is not less than %d\n",a,b);
      }
}

Output :

10 is not equal to 5
10 is greater than 5
10 is not less than 5

Logical Operators : Following table shows all the logical operators supported by C language. Assume variable A holds 1 and variable B holds 0, then :

Operators	Description	Examples
&&	Called Logical AND operator. If both the operands are non-zero, then the condition becomes true.	(A && B) is false.
||	Called Logical OR Operator. If any of the two operands is non-zero, then the condition becomes true.	(A || B) is true.
!	Called Logical NOT Operator. It is used to reverse the logical state of its operand. If a condition is true, then Logical NOT operator will make it false.	!(A && B) is true.

Example :

#include <stdio.h>
int main()
{
      int a=5;
      int b=20;
      if( a && b )
      {
            printf("The condition is true");
      }
      else
      {
            printf("The condition is false");
      }
}

Output :

The condition is true

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