Nested if statement in C Langauge
In nested if statement, one if statement block is enclosed within another if statement block. The syntax of nested if statement is:
if(Condition-1)
{
if(Condition-2)
Statement-Block-1;
else
Statement-Block-2;
}
else
{
if(Condition-3)
Statement-Block-3;
else
Statement-Block-4;
}
Initially Condition-1 is checked. If it is true, Condition-2 is checked. If Condition-2 is also true, Statement-Block-1 is executed. If Condition-2 is false, Statement-Block-2 is executed. If Condition-1 as false, Condition-3 is checked. If Condition-3 is true, Statement-Block-3 will be executed. if Condition3 is false, Statement-Block-4 will be executed.
| Program to demonstrate the use of nested if statement. |
| #include<stdio.h> #include<conio.h> main() { int a; clrscr(); 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”); getch(); } |
| Output |
| Enter a value:=3 Value is between 0 & 5 |
In the above program, a has been entered 6.
Condition if(a>=0) is true, So condition if(a<=10) is checked. This condition is also true so printf(“\nValue is between 0 & 10”) gets executed.