PRE INCREMENT AND POST INCREMENT IN C

PRE INCREMENT
Pre increment operator is used to increment the value of a variable before using that variable in a syntax.

EXAMPLE
In the below example 'a' is a variable name and Pre-increment (++)  operator adding 1 in the value of 'a' before executing the variable 'a', So the printf statement print 5 as the value of a variable.
void main()
{
int a=4;
printf(%d",++a); // Example of pre increment operator
getch();
}

- - - - - PROGRAM OUTPUT - - - - -
5
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POST INCREMENT
Post increment operator is used to increment the value of a variable after execute that variable expression.

EXAMPLE
In the below example the Post-increment operator adding 1 in the value of  'a' variable after executing the variable in the printf statement, therefore the printf statement will print the 4 as output value.
void main()
{
int a=4;
printf(%d",a++); // Example of post increment operator
getch();
}

- - - - - PROGRAM OUTPUT - - - - -
4
- - - - - - - - -- - - - - - - - - - - - - - - - - -

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