Booleans

Java Booleans

A boolean is a data type that can only hold two values: true or false. Booleans are great for making decisions in your code.

Declaring booleans

boolean isJavaFun = true;
boolean isFishTasty = false;
System.out.println(isJavaFun);
System.out.println(isFishTasty);

Boolean expressions

A boolean expression compares values and returns true or false:

int x = 10;
int y = 9;
System.out.println(x > y); // true, because 10 is higher than 9

Comparison operators

Using booleans in conditions

int age = 25;
int votingAge = 18;
System.out.println(age >= votingAge); // true

TL;DR

• Booleans hold only true or false.
• Comparison operators create boolean values.
• Use booleans to control decisions like if statements.