Class-6

Class 6 – Introduction to JavaScript

Slides: Class6

Math Class Functions

• Math.round(): Rounds a number to the nearest integer.
• Math.ceil(): Rounds a number up to the nearest integer.
• Math.floor(): Rounds a number down to the nearest integer.
• Math.random(): Returns a random number between 0 (inclusive) and 1 (exclusive).

Controlling the Length of Decimals

• toFixed(): Limits the number of decimal places in a number to a specified length.

Arrays

• Definition and Use: Arrays store multiple values in a single variable, useful for collections of data.
• Creating Arrays: Arrays can be created using array literals or the new keyword.
• Accessing Elements: Array elements are accessed using their index numbers.
• Updating Elements: Elements can be added or updated using their index.

Array Properties and Methods

• Length Property: Returns the number of elements in an array.
• Push Function: Adds elements to the end of an array.
• Pop Function: Removes the last element from an array.
• Shift Function: Removes the first element from an array.
• Unshift Function: Adds elements to the beginning of an array.

Array Data Structures

• Stack (LIFO): Last In, First Out data structure.
• Queue (FIFO): First In, First Out data structure.

Modifying Arrays

• Splice Function: Adds or removes elements from an array at a specific index.
• Slice Function: Creates a new array from a subset of an existing array.

This lecture will provide a comprehensive understanding of JavaScript’s Math class functions and array operations, essential for efficient data manipulation and mathematical computations in your programs.