3.3 If Else Statements

Purpose of Else Statements

Else statements: Handles what happens when the if condition is false. Structure of If-Else:

  • If statement with a condition.
  • Else statement without a condition.
  • Both parts have code blocks surrounded by {}.

don’t forget the brackets

int x = 20;
if (x > 10) {

    console.log("x is greater than 10");
    console.log("This code when the condition is true");
    } else {
    
    console.log("x is 10 or less");
    console.log("This code runs when the condition is false");
}
//    Without brackets:
        
   console.log("x is greater than 10");
   console.log("this code will always run");

image

  1. Based on this code, if you were younger than 16 what would it print out?
  2. Write your own if else statement

answer

  1. Based on this code, if I was younger than 16, the output should be the second one: “You are not old enough for a license yet.”
  2. ↓↓↓
public static void main(String[] args) {
    double myHeight = 5.7;
    System.out.println("Current height: " + myHeight);
    
    if (myHeight >= 5.7) {
        System.out.println("You can ride this dangerous ride in DNHS.");
    } else {
        System.out.println("You are not tall enough to ride this dangerous ride in DNHS.");
    }
}

main(null);

Current height: 5.7
You can ride this dangerous ride in DNHS.