You must first complete Simple if statement in C language before viewing this Lesson
if else statement in C language
In if else statement, there is only one condition. If condition is true, one set of statements will be executed otherwise another set of statements will be executed
Syntax of if else statement is:
if(Condition)
{
Statement-Block1;
}
else
{
Statement-Block2;
}
Condition is any relational or logical expression If this condition is true, then Statement-Block1 will be executed Otherewise if condition is false Statement-Block2 will be executed.
| Program to demonstrate the use of if else statement. |
| #include<stdio.h> #include”conio.h” #include<math.h> main() { int a; clrscr(); printf(“\nEnter a number:=”); scanf(“%d”,&a); if(a>0) printf(“\nnumber is positive”); else printf(“\nNumber is not positive”); getch(); } |
| Output |
| Enter a number:= -7 Number is not positive |
In the above program, a has been entered 7. Condition a>0 is true so printf(“Number is positive”) will be executed