Boolean Data Types in JavaScript
•JavaScript•2 min read
javascriptboolean data typedata types
A Boolean represents a logical entity that can have only two values: true or false.
The third type of primitive data in JavaScript is the Boolean type.
1. Boolean Type
A Boolean represents a logical entity that can have only two values: true or false. Booleans are primarily used for decision-making in conditional statements.
Example: Declaring a Boolean Value
let status = true;
// Print the Boolean value
document.write(status); // Output: trueExplanation:
- Here,
statusis a Boolean variable holding the valuetrue.
2. Comparison Operators
- In JavaScript, comparison operators evaluate expressions and return a Boolean value (
trueorfalse). These operators compare two values and produce a Boolean result. - Example: Using Comparison Operators
document.write(5 > 3); // Output: true
document.write(5 < 3); // Output: false
document.write(5 == 5); // Output: true
document.write(5 != 3); // Output: trueExplanation:
- The comparison operators such as
>,<,==, and!=compare values and return eithertrueorfalsedepending on the result.
3. Logical Operators
- JavaScript also provides logical operators to combine or manipulate Boolean values. The most commonly used logical operators are
AND (&&),OR (||), andNOT (!). - Example: Using Logical Operators
// AND (&&) operator: both conditions must be true
let andResult = (true && true);
document.write(andResult); // Output: true
// OR (||) operator: one of the conditions must be true
let orResult = (true || false);
document.write(orResult); // Output: true
// NOT (!) operator: reverses the Boolean value
let notResult = !true;
document.write(notResult); // Output: falseExplanation:
- AND (&&): Returns true if both operands are true. Otherwise, it returns false.
- OR (||): Returns true if at least one operand is true. Otherwise, it returns false.
- NOT (!): Returns the opposite of the operand's value. If the operand is true, it returns false, and vice versa.
Summary:
- Boolean values represent
trueorfalse. - Comparison operators return Boolean values after evaluating expressions.
- Logical operators like
AND,OR, andNOTare used to manipulate Boolean values and combine conditions.
