String Objects In JavaScript

A string is a group of Characters .
M -> is a Character
Moral -> is a group of Characters or contains 5
Characters or is a string.

A string is an Object

A string is an object in Javascript , an object have properties and methods or functions, so a string is having property and methods in javascript.

String property

Length – property returns the no of characters present in string.

String Methods

bold() – returns the string formatting to bold.
italics() – returns the string formatting italics.
charAt() – returns the character present in string at given position.
substring() – returns the characters present from given start position to given end position.
toLowerCase() – returns the string converted to lowercase letters.
toUpperCase() – returns the string converted to uppercase letters.

Length

Length is a property of sring object, using which we can know the number of characters in a string.

Example 1:

<html>

<head>

<script>

var a=”Hindustan”

document.write(“Length of Variable a is “+a.length);

</script>

</html>

Output will be:

Length of Variable a is 9

Example 2:

<html>

<head>

<script>

var name=”Manmohan Singh”

document.write(“Length of Variable a is “+name.length);

</script>

</html>

Output will be:

Length of Variable a is 14

String Methods – bold()

Example 1:

<html>

<head>

<script>

var a=”Uttar Pradesh”

document.write(“The Value of Variable a is “+a.bold());

</script>

</html>

Output will be :

The Value of Variable a is Uttar Pradesh

Example 2:

<html>

<head>

<script>

var state=”Bihar”

document.write(“State : “+state.bold());

</script>

</html>

Output will be:

State : Bihar

String Methods – charAt()

Example 1:

<html>

<head>

<script>

var state=”Bihar”

document.write(“<br>character at 0th position is : “+state.charAt(0));

document.write(“<br>character at 1st position is : “+state.charAt(1));

document.write(“<br>character at 2nd position is : “+state.charAt(2));

</script>

</html>

Output will be :

character at 0th position is : B
character at 1st position is : i
character at 2nd position is : h

Exapmple 2:

<html>

<head>

<script>

var state=”Bihar”

state=state.charAt(2).bold().italics()

document.write(“Character at 2nd position is : “+state);

</script>

</html>

Output will be:

Character at 2nd position is : h

String Methods – italics()

Example 1:

<html>

<head>

<script>

var state=”Bihar”

document.write(“State : “+state.italics());

</script>

</html>

Example 2:

<html>

<head>

<script>

var state=”Bihar”

state=state.bold();

state=state.italics();

document.write(“State : “+state);

</script>

</html>

String Methods – toLowerCase()

Example 1:

<html>

<head>

<script>

var state=”HIMANCHAL PRADESH”

state=state.toLowerCase()

document.write(“State : “+state);

</script>

</html>

Output will be:

State : himanchal pradesh

Example 2:

<html>

<head>

<script>

var state=”HIMANCHAL PRADESH”

state=state.substring(0,state.length).toLowerCase().bold().italics()

document.write(“State : “+state);

</script>

</html>

Output will be :

State : himanchal Pradesh

String Methods – toUpperCase()

Example 1:

<html>

<head>

<script>

var state=”uttranchal”

state=state.toUpperCase()

document.write(“State : “+state);

</script>

</html>

Example 2:

<html>

<head>

<script>

var state=”uttranchal”

state=state.substring(0,state.length).toUpperCase().bold().italics()

document.write(“State : “+state);

</script>

</html>

output will be:

State : UTTRANCHAL

String Methods – substring()

Example 1:

<html>

<head>

<script>

var state=”Bihar”

state=state.substring(0,3)

document.write(“Characters from 0th to 2nd position are : “+state);

</script>

</html>

Output will be:

Characters from 0th to 2nd position are : Bih

Example 2:

<html>

<head>

<script>

var state=”Bihar”

state=state.substring(0,3).bold().italics()

document.write(“Characters from 0th to 2nd position are : “+state);

</script>

</html>

Output will be:

Characters from 0th to 2nd position are : Bih