if statement in C language contains only true block which means if the specified condition is true then the true block is executed.

Syntax of if statement:

if (condition or expression)
{
  conditional code;
}

Program example of if statement in C

//An example of if statement in C
#include<stdio.h>

int main()
{
  int a = 10, b = 20;
  printf("Consider a = 10 and b = 20\n");
  if(a>b)
  {
    printf("a is greater\n");
  }

  if(b>a)
  {
    printf("b is greater\n");
  }

  printf("This is an example of if statement in C\n");
  return 0;
}

Output

Consider a = 10 and b = 20
b is greater
This is an example of if statement in C

In the above example we have two integer variables a and b having value 10 and 20 respectively. In the first if statement we have a condition a>b, since a is not greater b so this block is skipped. And in second if statement we have a condition b>a since this condition is true so the conditional code inside the block is executed.