Assignment Operators Quiz for High School Students

📚 Quick Study Guide

• 🧮 Assignment operators are used to assign values to variables.
• ➕ The basic assignment operator is `=` which assigns the value on the right to the variable on the left (e.g., `$x = 5;` assigns the value 5 to the variable $x$).
• ➡️ `+=` (Add and Assign): Adds the right operand to the left operand and assigns the result to the left operand (e.g., `$x += 3;` is the same as `$x = x + 3;`).
• ➖ `-=` (Subtract and Assign): Subtracts the right operand from the left operand and assigns the result to the left operand (e.g., `$x -= 3;` is the same as `$x = x - 3;`).
• ✖️ `*=` (Multiply and Assign): Multiplies the left operand by the right operand and assigns the result to the left operand (e.g., `$x *= 3;` is the same as `$x = x * 3;`).
• ➗ `/=` (Divide and Assign): Divides the left operand by the right operand and assigns the result to the left operand (e.g., `$x /= 3;` is the same as `$x = x / 3;`).
• 💯 `%=` (Modulo and Assign): Takes the modulo of the left operand by the right operand and assigns the result to the left operand (e.g., `$x %= 3;` is the same as `$x = x % 3;`).

🧪 Practice Quiz

1. What is the value of $x$ after the operation `$x = 5; x += 3;`?
1. A. 5
2. B. 3
3. C. 8
4. D. 2
2. Which assignment operator is used to multiply a variable by a value and assign the result back to the variable?
1. A. `+=`
2. B. `-=`
3. C. `*=`
4. D. `/=`
3. What is the value of $y$ after the operation `$y = 10; y %= 3;`?
1. A. 1
2. B. 3
3. C. 10
4. D. 0
4. Which of the following is equivalent to `$a = a - 5;`?
1. A. `$a += 5;`
2. B. `$a -= 5;`
3. C. `$a *= 5;`
4. D. `$a /= 5;`
5. What will be the output of the following code snippet: `$num = 20; $num /= 4; echo $num;`?
1. A. 20
2. B. 4
3. C. 5
4. D. 0
6. If $z = 7$, what is the value of $z$ after the operation `$z *= 2;`?
1. A. 7
2. B. 9
3. C. 14
4. D. 5
7. Which assignment operator calculates the remainder of a division?
1. A. `+=`
2. B. `-=`
3. C. `*=`
4. D. `%=`