Combining Boolean Comparisons

In JavaScript, logical operators are used to perform logical operations on Boolean values (true or false) and are crucial in making decisions and controlling the flow of programs. The main logical operators are:

AND (&&)

• Returns true if both operands are true.

• Returns false if at least one operand is false.

Example:

let a = true;
let b = false;
console.log(a && b); // Output: false

OR (||)

• Returns true if at least one of the operands is true.

• Returns false only if both operands are false.

Example:

let a = true;
let b = false;
console.log(a || b); // Output: true

NOT (!)

• Inverts the Boolean value of its operand.

• If the operand is true, it returns false; if the operand is false, it returns true.

Example:

let a = true;
console.log(!a); // Output: false

Short-Circuiting Behavior

• AND (&&): If the first operand is false, JavaScript doesn’t evaluate the second operand because the entire expression will be false.

• OR (||): If the first operand is true, JavaScript doesn’t evaluate the second operand because the entire expression will be true.

Example:

let a = false;
let b = true;
console.log(a && b); // Output: false (b is not evaluated)
console.log(a || b); // Output: true (b is evaluated)

These operators are used in conditions, loops, and functions to make the code more dynamic by allowing complex conditions and logical flow.