Javascript Programming Tutorials, Guides & Best Practices

// AND operator
console.log(true && true); // true
console.log(true && false); // false

// OR operator
console.log(false || true); // true
console.log(false || false); // false

// NOT operator
console.log(!true); // false
console.log(!false); // true

Use comparison and logical operators together for complex conditions.

     let remainder = 10 % 3; // 1

• Raises the first operand to the power of the second operand.
• Example:

• Arrow Functions (ES6):

  const multiply = (a, b) => a * b;
  console.log(multiply(4, 7)); // 28

    console.log("abc" * 2); // NaN

Used for very large integers beyond the safe range of number.

     function test() {
       var y = 20;
       console.log(y); // 20
     }
     console.log(y); // Error: y is not defined

let name = "Alice";
console.log(name);

const BIRTH_YEAR = 1990;
// BIRTH_YEAR = 2000; // Error: Assignment to constant variable