If Statement in C

if statement is used to test the condition, if condition is true then the statement is executed ,and If the condition is false then the statements inside if body are completely ignored.

if(condition){
//code to be executed
}

Example 1:) Print the Even Number in C

#include<stdio.h>  
int main(){  
int number=0;  
printf("Enter a number:");  
scanf("%d",&number);  
if(number%2==0){  
printf("%d is even number",number);  
}  
return 0;
}  

Output

Enter a number:4
4 is even number
enter a number:5

Example 2:) Find the largest number .

#include <stdio.h>
int main()
{
    int a, b, c; 
     printf("Enter three numbers?");
    scanf("%d %d %d",&a,&b,&c);
    if(a>b && a>c)
    {
        printf("%d is largest",a);
    }
    if(b>a  && b > c)
    {
        printf("%d is largest",b);
    }
    if(c>a && c>b)
    {
        printf("%d is largest",c);
    }
    if(a == b && a == c) 
    {
    	printf("All are equal"); 
    }
}

Output

Enter three numbers?
12 23 34
34 is largest

Example 3:) Find the biggest of two number .

#include <stdio.h>
#include <conio.h>
main()
{
    int a, b, big; 
    clrscr();
  printf("Enter two numbers : ");   
  scanf("%d %d,&a,&b);  
  big=a;
  if(b>big)
  big=b;
 printf("\n Biggest  numbers is %d",big);   
 getch();
 }

Output

Enter two numbers: 5 8
Biggest  numbers is 8

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If Statement in C