Examples of Arithmetic Operators in JavaScript

🧠 Quick Study Guide: JS Arithmetic Operators

• ➕ Addition (`+`): Used to sum two operands. Example: `5 + 3` evaluates to `8`.
• ➖ Subtraction (`-`): Used to find the difference between two operands. Example: `10 - 4` evaluates to `6`.
• ✖️ Multiplication (`*`): Used to multiply two operands. Example: `6 * 2` evaluates to `12`.
• ➗ Division (`/`): Used to divide two operands, returning the quotient. Example: `15 / 3` evaluates to `5`.
• 🔢 Modulus (`%`): Returns the remainder of a division operation. Example: `10 % 3` evaluates to `1`.
• 💡 Exponentiation (``): Raises the first operand to the power of the second (ES2016+). Example: `2 3` evaluates to `8`.
• ⬆️ Increment (`++`): Increases an operand's value by one. Can be prefix (`++x`) or postfix (`x++`). Example: `let x = 5; x++;` results in `x` being `6`.
• ⬇️ Decrement (`--`): Decreases an operand's value by one. Can be prefix (`--y`) or postfix (`y--`). Example: `let y = 8; y--;` results in `y` being `7`.
• ⚖️ Operator Precedence: JavaScript follows standard mathematical rules (like PEMDAS/BODMAS). Parentheses `()` can be used to override default precedence.

📝 Practice Quiz: Test Your Knowledge

1. Which JavaScript operator returns the remainder of a division?

1. /
3. %
4. *

3. Consider the following JavaScript code:
let a = 7;
let b = 2;
let result = a b;
What is the value of result?

1. 9
2. 14
3. 49
4. 3.5

4. If let x = 10; and then x--; is executed, what is the new value of x?

1. 10
2. 11
3. 9
4. Error

5. What is the result of (5 + 3) * 2 in JavaScript, considering operator precedence?

1. 16
2. 13
3. 10
4. 8

6. Which operator is used for multiplication in JavaScript?

1. x
2. *
3. .
4. m

7. What will console.log(10 / 3); output in JavaScript?

1. 3
2. 3.333...
3. 1
4. Error