Strings are use to store and manipulate. It is a group of Characters is called String. String can be creates using single quotes and double quotes. It can be create using the following Syntax.
let name = “basic”
Template Literals
Template Literals use backticks of Quotes to define a string.
Let name = `basic`
With template literals, it is possible to use both single as well as double quotes inside a string.
let Sentence = ` my name “is” Basic engineer.
We can insert variable directly in template literal. This is called String interpolation.
let a = ` this is $ {name}`
<html>
<body>
<script>
var why="hello basic phone";
document.write(why);
</script>
</body>
</html>
Output : hello basic phone.
String Methods
charAt()
This function returns the given Position character is knows charAt().
Syntax : Obj.charAt(index);
Example
<html>
<body>
<script>
var why="basic";
document.write(why.charAt(2));
</script>
</body>
</html>Output: s
charCodeAt()
The Unicode value of the character at the given index.
Concat()
This function concat two string and store it in third one is knows as Concat.
Syntax: str1.concat(str2);
Example
<html>
<body>
<script>
var su1="hello ";
var su2="student";
var su3=su1+su2;
document.write(su3);
</script>
</body>
</html>Output: hello student
IndexOf()
The position of a char value present in the given string is know as IndexOf().
Example
<html>
<body>
<script>
var su1="The position of a char value";
var nm=su1.indexOf("a");
document.write(nm);
</script>
</body>
</html>
Output : 16
lastIndexOf()
String object of the last occurrence of the specified value is knows lastIndexOf().
Example
<html>
<body>
<script>
var sn="String object of the last occurrence";
var nm=sn.lastIndexOf("of");
document.write(nm);
</script>
</body>
</html>
Output : 14
replace()
This method replace all the occurrence of given character with new character is knows as replace().
syntax : obj2= obj1 replace(‘old char’ , ‘new char’);
example
<html>
<body>
<script>
var string = 'why';
var newstring = string.replace(/why/, 'what');
document.write(newstring);
</script>
</body>
</html>
Output : what
Slice()
example
<html>
<body>
<script>
var what="why should hire you";
var why=what.slice(4,16);
document.write(why);
</script>
</body>
</html>Output: should hire
toLowerCase()
Convert the string into lowercase is knows as toLowerCase
Syntax : obj.toLowerCase();
Example
<html>
<body>
<script>
var su1="WHAT IS YOUR NAME";
var su2=su1.toLowerCase();
document.write(su2);
</script>
</body>
</html>
Output : what is your name
toUpperCase()
Convert the string into uppercase is knows as toUpperCase().
Syntax: obj.toUpperCase();
Example
<html>
<body>
<script>
var why="what is your name";
var whose=why.toUpperCase();
document.write(whose);
</script>
</body>
</html>
Output : WHAT IS YOUR NAME
trim()
It removes the blanks space from left and right side of the given string is knows as trim().
Syntax : obj2=obj1.trim();
<html>
<body>
<script>
var sum1=" superman badman";
var sum2=sum1.trim();
document.write(sum2);
</script>
</body>
</html>
Output: Superman badman
split()
Example
<html>
<body>
<script>
var str="why should hire you";
document.write(str.split(" "));
</script>
</body>
</html>
Output: why,should,hire,you
search()
valueOf()
lenght()
This return the length of the string including space. Length of the string means number of characters.
syntax: obj.lenght();
equal()
This returns true it given both strings are identical.
Syntax: obj1.equal (obj) ;
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