Nested if-else statements

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C Nested if-else statement

It is a conditional statement which is used when we want to check more than 1 conditions at a time in a same program. The conditions are executed from top to bottom checking each condition whether it meets the conditional criteria or not. If it found the condition is true then it executes the block of associated statements of true part else it goes to next condition to execute.

Syntax :

if(condition)
{
if(condition)
{
statements;
}
else
{
statements;
}
}
else
{
statements;
}
In above syntax, the condition is checked first. If it is true, then the program control flow goes inside the braces and again checks the next condition. If it is true then it executes the block of statements associated with it else executes else part


Example:

#include <stdio.h>
#include <conio.h>

void main()
{
int n;
clrscr();
printf("\n Enter Number :");
scanf("%d",&n);

if(n>0)
{
printf("\n\n Number is greater than 0 !");
}
else
{
if(n==0)
{
printf("\n\n It is 0 !");
}
else
{
printf("Number is less than 0 !");
}
}
getch();
}

Output :








Description:

If user enter 0 then the if condition will become false and hence thelse part
will execute in which one more if condition is present and since it becomes true
the if inside else is executed.

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