In c program the programmer specifies one or more conditions to evaluate and if the condition specified is correct move on else exit. C language handles decision-making by supporting the following statements.

• if statement
• switch statement
• conditional operator statement (? : operator)
• goto statement

if statement

The if statement can be implemented in different forms depending on the complexity of conditions for testing. The different forms are,

1. Simple if statement
2. if….else statement
3. Nested if….else statement
4. Using else if statement

Simple if statement

The syntax of simple if is

if

{

condition

}

Eg

if(a>b)

{

printf(“The value of A is greather than b”);

}

if….else statement

In this case 2 condition will check

if

{

condition statement

}

else

{

condition statement

}

In this expression is true, the condition 1 is executed, else condition 1 is skipped and condition 2 is executed.

Nested if….else statement

If Statement inside another IF Statement. Nested If in C is helpful if you want to check the condition inside a condition.

Else If Ladder

Else If statement in C effectively handles multiple statements by sequentially executing them.

if(test_expression)

{

//execute your code

} else if(test_expression n)

{

//execute your code

}

else

{

//execute your code

}