If-else Statement in C

It is used to perform two operations for a single condition.if the value of test-condition is true, then the true block of statements will be executed. If the value of test-condition if false, then the false block of statements will be executed.

Syntax:

if(condition) {
   Statement(s); //code to be executed if condition is true 
}
else {
   Statement(s); //code to be executed if condition is false 
}

See in Flowchart.

Example 1:) Check whether a number is even or odd .

#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);    
}    
else{    
printf("%d is odd number",number);    
}     
return 0;  
}    

Output

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

Example 2:) Greater or Less than number .

    #include<stdio.h>

main()
{
  int a, b;

  printf("Please enter the value for a:");
  scanf("%d", & amp; a);

  printf("\nPlease the value for b:");
  scanf("%d", & amp; b);

  if (a & gt; b) {  
    printf("\n a is greater");
  } else {  
    printf("\n b is greater");
  }
}

Output

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If-else Statement in C