C operators are one of the features in C which has symbols that can perform various tasks as per the need of the program. There are many operators like as:

• Arithmetic Operator
• Increment/Decrement Operator
• Assignment Operator
• Relational Operator
• Logical Operator
• Bitwise Operator

Arithmetic Operator

Arithmetic Operators are the operators which are used to perform mathematical calculations like addition (+), subtraction (-), multiplication (*), division (/), and modulus (%). It performs all the operations on numerical values (constants and variables).

The following table below shows all the arithmetic operators supported by the C language for performing arithmetic operations:

Let’s look at an example of Arithmetic operations in C

// Arithmetic operators in C example
#include <stdio.h>
int main()
{
    int a = 12,b = 2, c;    
    c = a+b;
    printf("a+b = %d \n",c);
    c = a-b;
    printf("a-b = %d \n",c);
    c = a*b;
    printf("a*b = %d \n",c);
    c = a/b;
    printf("a/b = %d \n",c);
    c = a%b;
    printf("Remainder when a is divided by b = %d \n",c);   
    return 0;

}

Output:

a+b = 14
a-b = 10
a*b = 24
a/b = 6
a%b = 0

Increment/Decrement Operator

C programming has basically two operators which can increment (++) and decrement (–) the value. It can change the value of an operand by 1. Increment and Decrement Operators are very useful operators that are generally used to minimize the calculation. These two operators are unary operators, which means they can only operate on a single operand. For example, ++x and x++ means x=x+1 or –x and x−− means x=x-1. 

There is a distinction between ++ or −− when written before or after any operand. 

If we use the operator as a prefix, it adds 1 to the operand, and the result is assigned to the variable on the left. Whereas, when it is used as a post-fix, it first assigns the value to the variable on the left i.e., it first returns the original value, and then the operand is incremented by 1.

//Example of increment and decrement operators
#include <stdio.h>
int main()
{
    int p = 14, q = 70;
    float r = 120.6, s = 34.5;
    printf("++p = %d \n", ++p);
    printf("--q = %d \n", --q);
    printf("++r = %f \n", ++r);
    printf("--s = %f \n", --s);
    return 0;

}

Output:

++p = 15
--q = 69
++r = 121.600000
--d = 33.500000

Assignment Operator

An assignment operator is mainly responsible for assigning a value to a variable in a program. Assignment operators are used to assign the result of an expression to a variable. This operator assigning the values to any variable. The most common assignment operator is ‘=’. 

C language has a collection of shorthand assignment operators that can be used for C programming.

There is a list of all assignment operators :

//Example of assignment operators
#include <stdio.h>
int main()
{
    int a = 7, b;
    b = a;      // b is 7
    printf("b = %d\n", b);
    b += a;     // b is 14 
    printf("b = %d\n", b);
    b -= a;     // b is 7
    printf("b = %d\n", b);
    b *= a;     // b is 49
    printf("b = %d\n", b);
    b /= a;     // b is 7
    printf("c = %d\n", c);
    b %= a;     // b = 0
    printf("b = %d\n", b);

    return 0;
}

b = 7
b = 14 
b = 7
b = 49 
b = 7
b = 0

// Example of relational operators
#include <stdio.h>
int main(
{
    int x = ,9 y = 11;
   printf("%d == %d is False(%d) \n", x, y, x == y);
   printf("%d != %d is True(%d) \n ", x, y, x != y);
   printf("%d > %d is False(%d)\n ",  x, y, x > y);
   printf("%d < %d is True (%d) \n", x, y, x < y);
   printf("%d >= %d is False(%d) \n", x, y, x >= y);
   printf("%d <= %d is True(%d) \n", x, y, x <= y);

    return 0;
}

9 == 11 is False(0)
9 != 11 is True(1)
9 > 11 is False(0)
9 < 11 is True(1)
9 >= 11 is False(0)
9 <=11 is True(1) 

// Example of logical operators

#include <stdio.h>
int main()
{
    int a = 5, b = 5, c = 10, result;

    result = (a == b) && (c > b);
    printf("(a == b) && (c > b) is %d \n", result);

    result = (a == b) && (c < b);
    printf("(a == b) && (c < b) is %d \n", result);

    result = (a == b) || (c < b);
    printf("(a == b) || (c < b) is %d \n", result);

    result = (a != b) || (c < b);
    printf("(a != b) || (c < b) is %d \n", result);

    result = !(a != b);
    printf("!(a != b) is %d \n", result);

    result = !(a == b);
    printf("!(a == b) is %d \n", result);

    return 0;
}

(a == b) && (c > b) is 1 
(a == b) && (c < b) is 0 
(a == b) || (c < b) is 1 
(a != b) || (c < b) is 0 
!(a != b) is 1 
!(a == b) is 0