3.1 Boolean Expressions

Java’s relational operators

  • equal to: ==
  • not equal to: !=
  • less than: <
  • greater than: >
  • less than or equal to: <=
  • greater than or equal to >=

Hack!

int myAge = 15;
int otherAge = 45;

using these integers, determine weather the following statements are True or False

Screenshot 2024-09-15 at 10 00 54 PM

Strings

popcorn hack

whats wrong with this code? (below)


String myName = "Alisha"; //names should be in parantheses because they are strings

myName != "Anika";
myName == "Alisha";

true

comparison of string objects should be done using String methods, NOT integer methods.

  • .equal
  • compare to
String myName = "Alisha";
boolean areNamesEqual = myName.equals("Alisha");  

if (areNamesEqual) {
    System.out.println("True");
} else {
    System.out.println("False");
}


True

homework question

Screenshot 2024-09-16 at 8 05 24 AM what is the precondition for num?

The preconditions for the num is for it to be a non-negative integer and it should have between one and six digits!