How to use boolean in java

In Java, boolean is a basic data type with only two possible values: true and false. The boolean type is often used for conditional testing, such as comparison or checking whether a certain condition is met.

Here are some examples showing how to use boolean type in Java:

Declaring boolean variables:

boolean isTrue;

Assign a value to true or false:

isTrue = true;

or

isTrue = false;

Use a boolean expression in the if statement:

if (isTrue) {  
    System.out.println("The statement is true.");  
} else {  
    System.out.println("The statement is false.");  
}

Use boolean expressions in while statements:

boolean running = true;  
while (running) {  
    // do something  
    if (someCondition) {  
        running = false;  
    }  
}

Boolean logical operations (&&, ||, !):

boolean a = true;  
boolean b = false;  
  
// 使用&& (AND) 操作符  
if (a && b) {  
    System.out.println("Both a and b are true.");  
} else {  
    System.out.println("At least one of a or b is false.");  
}  
  
// 使用|| (OR) 操作符  
if (a || b) {  
    System.out.println("At least one of a or b is true.");  
} else {  
    System.out.println("Both a and b are false.");  
}  
  
// 使用! (NOT) 操作符  
if (!a) {  
    System.out.println("a is false.");  
} else {  
    System.out.println("a is true.");  
}

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