30. Logical Operators

Logical operators allow us to combine multiple boolean conditions.

1. Logical AND (&&)

Returns true only if both operands are true.

javascript let age = 20; let hasLicense = true;

// Must be 18 AND have a license let canDrive = (age >= 18) && hasLicense; console.log(canDrive); // true

2. Logical OR (||)

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

javascript let isWeekend = false; let isHoliday = true;

// We can relax if it is the weekend OR a holiday let canRelax = isWeekend || isHoliday; console.log(canRelax); // true

3. Logical NOT (!)

Reverses the boolean result (flips true to false and false to true).

javascript let isActive = true; console.log(!isActive); // false

Short-Circuiting (Advanced Tip)

&& and || evaluate from left to right. If the result can be determined early, the rest of the expression is skipped. For example, in A || B, if A is true, B is never checked.