if(boolean_expression) {
   /* statement(s) will execute if the boolean expression is true */
}

package main

import "fmt"

func main() {
   /* local variable definition */
   var a int = 10

   /* check the boolean condition using if statement */
   if( a < 20 ) {
      /* if condition is true then print the following */
      fmt.Printf("a is less than 20\n" )
   }
   fmt.Printf("value of a is : %d\n", a)
}

a is less than 20;
value of a is : 10