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Explain Nested if-else statement in C language
A ‘nested if’ is an if statement that is the object of either if (or) an else. ‘if’ is placed inside another if (or) else.
Syntax
Refer the syntax given below −
if (condition1){ if (condition2) stmt1; else stmt2; } else{ if (condition3) stmt3; else stmt4; }
Example
Given below is the C program to execute Nested If Else conditional operators −
#include<stdio.h> void main (){ int a,b,c,d; printf("Enter the values of a,b,c: \n"); scanf("%d,%d,%d",&a,&b,&c); if((a>b)&&(a>c)){//Work with 4 numbers// if(a>c){ printf("%d is the largest",a); } else { printf("%d is the largest",c); } } else { if(b>c){ printf("%d is the largest",b); } else { printf("%d is the largest",c); } } }
Output
You will see the following output −
Enter the values of a,b,c: 3,5,8 8 is the largest
Example
Following is the C program to check the number is positive or negative −
#include <stdio.h> int main(){ int num; printf("Enter a number:\n "); scanf ("%d ", &num); if(num > 0){ printf("This is positive num:%d\n", num); } else if(num < 0){ printf("This is a negative num:%d",num); } else { printf("This is a zero:%d",num); } return 0; }
Output
You will see the following output −
Run 1: Enter a number: 23 23=This number is positive Run 2: Enter a number: -56 -56=This number is negative
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