Number Data Types in JavaScript
•JavaScript•2 min read
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In JavaScript, there are 5 types of primitive data types. The first and most commonly used is the Number type.
Primitive Data Types in JavaScript: Number
In JavaScript, there are 5 types of primitive data types. The first and most commonly used is the Number type.
1. Number Type
- The number type in JavaScript defines numeric values, which can include integers, floating-point numbers, and even binary numbers.
- JavaScript allows performing all mathematical operations using numbers.
- Example: Basic Arithmetic Operations
let a = 10;
let b = 20;
// Add two numbers and display the result
document.write("a + b = " + (a + b)); // Output: "a + b = 30"Explanation:
- Here,
aandbare initialized as numbers (10and20). - The addition operation (
a + b) results in30, which is displayed usingdocument.write().
2. Comparison Operators
- Numbers can be compared using comparison operators such as:
- Greater than (>),
- Less than (<),
- Equal to (==),
- Not equal to (!=).
- These operators return boolean values (
trueorfalse) based on the result of the comparison. - Example: Using Comparison Operators
let x = 15;
let y = 25;
document.write(x > y); // Output: "false"
document.write(x < y); // Output: "true"
document.write(x == y); // Output: "false"
document.write(x != y); // Output: "true"Explanation:
- The comparison
x > ychecks ifxis greater thany, returningfalsesince15is less than25. - Similarly, the other comparison operations return boolean values based on the given conditions.
3. NaN (Not-a-Number)
- JavaScript has a special numeric value called
NaN(Not-a-Number), which represents an operation result that is mathematically undefined or cannot be represented as a valid number. - Example: NaN in Action
let result = "hello" * 10;
document.write(result); // Output: "NaN"Explanation:
- Here, multiplying a string (
"hello") by a number (10) results inNaNbecause this operation is undefined in JavaScript.
Summary:
- The number type supports all mathematical operations.
- Comparison operators return boolean values based on number comparisons.
- NaN represents undefined or invalid numerical operations.
