Increment and Decrement Operator in C

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Increment and decrement operators in C

The increment operator (++) increments the value of its operand by 1.

     x = 10;
     x++;  // increments the value of x by 1.  So, the value of x is 11.

The decrement operator(--) decrements the value of its operand by 1;

     x = 10;
     x--;  // decrements the value of x by 1;  So, the value of x is 9.
 
Both the operators can be placed before or after the operand as shown above and they can be applied on primitive data types like char, int, float, double & they can also be used on pointers and enums.

Difference between postfix increment and prefix increment:

Example 1:
int a, b = 10;
a = b++;

Value of a is 10
Value of b is 11

In the above expression, the value of b is assigned to a first.  Then, 1 is added to the value of b.

Example 2:
int a, b = 10
a = ++b;

Value of a is 11
Value of b is 11

Here, the value of b is incremented(add 1 to b)  first.  Then, the incremented value of b is assigned to a.

Difference between prefix decrement and postfix decrement
Example 1:
int a, b = 10;
a = b--;

Value of a is 10
Value of b is 9

In the above expression, the value of b is assigned to a first.  Then, 1 is subtracted from the value of b.

Example 2:
int a, b = 10
a = --b;

Value of a is 9
Value of b is 9

Here, the value of b is decremented(subtract 1 from b) first.  Then, the decremented value of b is assigned to a.

 All In One EXAMPLE:-

OUTPUT

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