Nested if statement in C Language
In nested if statement, one if statement block is enclosed within another if statement block. The syntax of nested if statement is:
if(Test-1)
{
if(Test-2)
Block-1;
else
Block-2;
}
else
{
if(Test-3)
Block-3;
else
Block-4;
}
Test-1, Test-2 and Test-3 are conditions
Initially Test-1 condition is evaluated. If it is true, Test-2 condition is evaluated. If Test-2 is also true, Block-1 of statements gets executed. If Test-2 condition is false, Block-2 of statements is executed. If Test-1 condition is false, Test-3 condition is evaluated. If it is true, Block-3 of statements gets executed. if Test-3 is false, Block-4 of statements gets executed.
Program to demonstrate the use of nested if statement. |
#include<stdio.h> main() { int a; printf("\nEnter a value:="); scanf("%d",&a); if(a>=0) { if(a<=5) printf("\nValue is between 0 & 5"); else printf("\nValue is larger than 5"); } else printf("\nValue is smaller than 0"); return(0); } |
Output |
Enter a value:=13 Value is between 0 & 5 |
In the above program, value of variable a has been entered 13.
Test condition if(a>=0) is true, So condition if(a<=5) is checked. This condition is false so printf(“\nValue is larger than 5”) gets executed.