Explain the if-else statement

The if-else statement is used to make decisions, where if a condition is true, then it will execute a block of code; if it isn’t true (else), then it will execute a different block of code.

if(marks == 97) {
    // if marks are 97 then will execute this block of code
}
else {
    // else it will execute this block of code
}

Below is the C program to demonstrate an if-else statement:

#include <stdio.h>
int main() 
{
  int a = 10;
  if(a < 11)
  {
    printf("A is less than 11");
  }
  else
  {
    printf("A is equal to or "
           "greater than 11");
  }  
  return 0;
}

Output
A is less than 11