Javascript Mathematical Operations
Popcorn hack 1
Mathematical Operators in JavaScript
1. Addition
- Operator:
+
- Description: Adds two numbers together.
- Example:
let a = 5; let b = 3; let result = a + b; // result is 8
2. Subtraction
- Operator:
-
- Description: Subtracts the second number from the first.
- Example:
let a = 5; let b = 3; let result = a - b; // result is 2
3. Multiplication
- Operator:
*
- Description: Multiplies two numbers.
- Example:
let a = 5; let b = 3; let result = a * b; // result is 15
4. Division
- Operator:
/
- Description: Divides the first number by the second.
- Example:
let a = 15; let b = 3; let result = a / b; // result is 5
5. Modulus (Remainder)
- Operator:
%
- Description: Returns the remainder after division of one number by another.
- Example:
let a = 10; let b = 3; let result = a % b; // result is 1
6. Exponentiation
- Operator:
**
- Description: Raises the first number to the power of the second.
- Example:
let a = 2; let b = 3; let result = a ** b; // result is 8
7. Increment
- Operator:
++
- Description: Increases a variable by 1.
- Example:
let a = 5; a++; // a is now 6
8. Decrement
- Operator:
--
- Description: Decreases a variable by 1.
- Example:
let a = 5; a--; // a is now 4
9. Unary Negation
- Operator:
-
- Description: Converts a positive number to negative, and vice versa.
- Example:
let a = 5; let result = -a; // result is -5
10. Unary Plus
- Operator:
+
- Description: Attempts to convert the operand to a number.
- Example:
let a = "5"; let result = +a; // result is 5 as a number
11. Assignment with Operators
- Addition Assignment:
+=
let a = 5; a += 3; // a is now 8
- Subtraction Assignment:
-=
let a = 5; a -= 3; // a is now 2
- Multiplication Assignment:
*=
let a = 5; a *= 3; // a is now 15
- Division Assignment:
/=
let a = 15; a /= 3; // a is now 5
- Modulus Assignment:
%=
let a = 10; a %= 3; // a is now 1
- Exponentiation Assignment:
**=
let a = 2; a **= 3; // a is now 8
Example: Incrementing and Decrementing by More Than 1
You can increment or decrement a variable by more than 1 using the +=
and -=
operators.
Instructions:
- Use
+=
to increment a variable by a specific number. - Use
-=
to decrement a variable by a specific number.JavaScript Example:
```javascript let count = 10; // Increment by 5 count += 5; console.log(“After incrementing by 5:”, count); // Output: 15 // Decrement by 3 count -= 3; console.log(“After decrementing by 3:”, count); // Output: 12
Popcorn Hack One
Change the number below and change one mathematical opperation to your liking.
%%js
// JavaScript Hack: Even or Odd Transformation with Notebook Display
let origNum = 12; // Original number
let num = origNum; // Change this number to test different values
// Check if number is even or odd, and then transform
num % 2 === 0
? (num *= 2) // If even, multipy by 2
: (num **= 2); // If odd, square it
// Display initial and final result in Jupyter Notebook cell
console.log("Original number: " + origNum);
console.log("<br>");
console.log("Transformed number: " + num);
<IPython.core.display.Javascript object>