Basic JavaScript Discussion

1. JavaScript Types

  • Number

2. Createing Strings

You can use single or double quotes:

Example:

Creating String with single and double quotes

You can use Template Strings

Example:

Creating Strings with Template Strings

You can also create a strings with String Object

Creating String with String Object

3. JavaScript Strings Concat

Join Two Strings

Example:

Join Two Strings

Join Three Strings

Example:

Join Three Strings

4. JavaScript String indexOf () Method

The indexOf() method case sensitive. The indexOf() method return the first value of specified value in string. If the value to search for never occurs then methods returns -1.

Syntex: string.indexOf(searchingValue, start)

Example:

Saerch a string for “JavaScript”

JavaScript String indexOf

Search a string for “React”

Return value -1

5. JavaScript String length

Return the number of characters in a string

Syntex: string.length

Example:

string.length

6. JavaScript Random Number — Math.random()

Returns a random number between 0 and 1

Examples:

Random number

7. JavaScript Round — Math.round()

JavaScript round method returns a naerest intiger value

Example:

Math.round()

8. Create an Array

Array is a special variable, at a time which can hold more than one variable

syntex: const arrayName = [value1, value2, value3, ……..,valueN];

Example:

create an array

9. JavaScript Array push() Method

The push method adds new items to the ends of the array and returns the new array length

Syntex: array.push(value)

Example:

Push method

10. JavaScript Array pop() Method

Remove the last element of the array and returns that ements

Syntex: array,pop()

Example:

pop method