JS Char Archives - Tutorial

Get first n characters of string JavaScript | Example code

Posted April 15, 2021April 15, 2021 by Rohit

You can use substring or slice method to Get first n characters of string in JavaScript. Where n could be any number 1,2,3… so on. Get first n characters of string JavaScript Examples HTML examples code: Let’s get first 4 char from string in JS. Using substring() Method:

<!DOCTYPE HTML> 
<html> 
 
<body> 
 
	<script>
		var str = "HELLO WORLD";
		var res = str.substring(0, 4); 
 
		alert(res);
 
	</script> 
</body> 
</html>

<!DOCTYPE HTML>

<html>

<body>

var str = "HELLO WORLD";

var res = str.substring(0, 4);

alert(res);

</script>

</body>

</html>

Using slice() Method:

<!DOCTYPE HTML> 
<html> 
 
<body> 
 
	<script>
		var str = "HELLO WORLD";
		var res = str.slice(0,4);
 
		alert(res);
 
	</script> 
</body> 
</html>

<!DOCTYPE HTML>

<html>

<body>

var str = "HELLO WORLD";

var res = str.slice(0,4);

alert(res);

</script>

</body>

</html>

Output: Result Read More…

Get the first character of string JavaScript | example code

Posted April 8, 2021April 9, 2021 by Rohit

The simplest way to get the first character of the given string in JavaScript is charAt method. This method returns the character at the specified index in a string. Another way is the substring method to extracts the characters from a string, between two specified indices. Get the first character of string JavaScript Examples HTML Read More…

Get the middle character JavaScript | Extracting middle of a string example

Posted April 5, 2021April 8, 2021 by Rohit

Get the middle character JavaScript Example code: Let’s Create a function that returns the middle character/s of a sentence.

<!DOCTYPE HTML> 
<html> 

<body> 

	<script>
		var str = "This is an simple sentence.";
		function extractMiddle(str) {

			var position;
			var length;

			if(str.length % 2 == 1) {
				position = str.length / 2;
				length = 1;
			} else {
				position = str.length / 2 - 1;
				length = 2;
			}

			return str.substring(position, position + length)
		}

		console.log(extractMiddle(str));

	</script> 
</body> 
</html>

<!DOCTYPE HTML>

<html>

<body>

var str = "This is an simple sentence.";

function extractMiddle(str) {

var position;

var length;

if(str.length % 2 == 1) {

position = str.length / 2;

length = 1;

} else {

position = str.length / 2 - 1;

length = 2;

}

return str.substring(position, position + length)

}

console.log(extractMiddle(str));

</script>

</body>

</html>

Output: Do comment if you have any doubts and suggestions on this example code. RohitDegree in Computer Science and Engineer: App Developer and has multiple Programming languages experience. Enthusiasm for technology & like learning technical.