Write a C program to demonstrate post increment and pre increment operators

Increment operator (++)

• It is used to increment the value of a variable by 1. There are two types of increment operators, pre-increment and post-increment.

• The increment operator is placed before the operand in pre-increment and the value is first incremented and then the operation is performed on it.

For example,

z = ++a; a= a+1 z=a

• The increment operator is placed after the operand in post-increment and the value is incremented after the operation is performed.

For example,

z = a++; z=a a= a+1

Example 1

Following is an example for pre-increment operator −

 Live Demo

main ( ){    int A= 10, Z;    Z= ++A;    printf ("Z= %d", Z);    printf (" A=%d", A); }

Output

Z =11 A=11

Example 2

Following is an example for post-increment operator −

 Live Demo

main ( ){    int a= 10, z;    z= a++;    printf ("Z= %d", z);    printf ("A=%d", a); }

Output

Z=10 A=11

Decrement operator (- -)

• It is used to decrement the values of a variable by 1. There are two types of increment operators, pre decrement and post decrement.

• The decrement operator is placed before the operand in pre decrement and the value is first decremented and then the operation is performed on it.

For example,

z = - - a; a= a-1 z=a

• The decrement operator is placed after the operand in post decrement and the value is decremented after the operation is performed

For example,

z = a--; z=a a= a-1

Example 1

Following is an example for pre decrement operator −

 Live Demo

main ( ){    int a= 10, z;    z= --a;    printf ("Z= %d", z);    printf (" A=%d", a); }

Output

Z=9 A=9

Example 2

Following is an example for post decrement operator −

 Live Demo

main ( ){    int a= 10, z;    z= a--;    printf ("Z= %d", z);    printf ("A=%d", a); }

Output

Z=10 A=9