Operators in JavaScript Fundamentals

Prefix Increment and Decrement Operators

• The operator is placed before the variable, and the value of the variable is incremented or decremented before it is used.
• Example: let a = 10; console.log(++a); // 11 and let a = 10; console.log(--a); // 9

Postfix Increment and Decrement Operators

• The operator is placed after the variable, and the value of the variable is used before it is incremented or decremented.
• Example: let a = 10; console.log(a++); // 10 and let a = 10; console.log(a--); // 10

Comparison Operators

• Comparison operators compare two values and return a Boolean value: either true or false.
• They are useful in decision-making and loop programs in JavaScript.

Arithmetic Operators

• Addition: let sum = 5 + 3; console.log(sum); // 8
• Subtraction: let difference = 10 - 4; console.log(difference); // 6
• Multiplication: let product = 2 * 6; console.log(product); // 12
• Division: let quotient = 15 / 3; console.log(quotient); // 5
• Remainder (Modulus): let remainder = 17 % 4; console.log(remainder); // 1
• Exponentiation: let result = 2 ** 4; console.log(result); // 16

Assignment Operator

• Assignment operators are used to assign values to variables.
• The = sign is used for assignment.
• Examples:
  • Addition assignment: x += 3;
  • Subtraction assignment: x -= 2;
  • Multiplication assignment: x *= 4;
  • Division assignment: x /= 3;
  • Remainder (Modulus) assignment: x %= 5;
  • Exponentiation assignment: x **= 2;

Logical Operators

• Logical OR: true || true; // true, true || false; // true, false || true; // true, false || false; // false
• Logical NOT: ! converts the operator to Boolean and returns a flipped value.
• Example: let Yes = true; let No = false; console.log(!Yes); // false, console.log(!No); // true

Operator Precedence

• Operator precedence determines the order in which operators are parsed concerning each other.
• Example: let result = 2 + 3 * 4; console.log(result); // 14
• The order of operations is determined by the operator's precedence value.

Operator Associativity

• Operator associativity defines the order in which operators of the same precedence are evaluated.