Introduction:
Numbers are essential tools for representing numerical values in programming. In Javascript, we have different types of numbers to cater to various mathematical operations.
Key Concepts:
- Integers: Whole numbers without decimals, like 5, -10, or 0.
- Floating-Point Numbers: Numbers with decimals, like 3.14, -1.23e-5, or 9.99999999999999.
- Exponential Notation: A compact way to represent large or small numbers using powers of 10. For example, 3.14e-5 = 0.0000314.
Javascript Example:
// Represents numerical values
let integer = 10;
let float = 3.14;
let exponential = 1.23e-5;
console.log('Integer:', integer); // Output: Integer: 10
console.log('Float:', float); // Output: Float: 3.14
console.log('Exponential:', exponential); // Output: Exponential: 1.23e-5
Additional Notes:
- Integers can be positive, negative, or zero.
- Floating-point numbers can also be called real numbers.
- Pay attention to precision when using floating-point numbers, especially in calculations.
- Use exponential notation when dealing with very large or small numbers for readability and efficiency.