If statements allow for selective execution of instructions. If the condition specified evaluates to true, then the following instruction/instruction block will be executed. Otherwise, the following instruction/instruction block will be skipped.

Syntax

1. if(condition)
1. Instruction;

--or--

1. if(condition)
2. {
1. Instruction Block
3. }

Example

1. void main()
2. {
1. int a = 3;
2. if(a==2)
3. {
1. printf("\nSince A=3, this won't be printed");
4. }
5. if(a==3)
6. {
1. printf("\nSince A=3, this will be printed");
7. }
3. }