Examples of JavaScript Strings

Karamalshoufi
2022-05-06
|
  1792 
0
Java script programming,
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Karamalshoufi
2022-05-06
783
Easy

Split a string into an array of characters

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <title>JavaScript Split a String Into an Array of Characters</title>
</head>
<body>
    <script>
    var str = "INTERSTELLAR";
    var strArr = str.split("");
    document.write(strArr[0] + "<br>"); // Prints: I
    document.write(strArr[1] + "<br>"); // Prints: N
    document.write(strArr[strArr.length - 1]); // Prints: R
    document.write("<hr>"); // Prints: N
     
    // Loop through all the elements of the characters array and print them
    for(var i in strArr) {  
        document.write("<br>" + strArr[i]);
    }
    </script>
</body>
</html>

Output :

I

N

R

I

N

T

E

R

S

T 

E

L

L

A

R

Karamalshoufi
2022-05-06
782
Easy

Split a string into an array

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <title>JavaScript Split a String into an Array</title>
</head>
<body>
    <script>
    var fruitsStr = "Apple, Banana, Mango, Orange, Papaya";
    var fruitsArr = fruitsStr.split(", ");
    document.write(fruitsArr[0] + "<br>"); // Prints: Apple
    document.write(fruitsArr[2] + "<br>"); // Prints: Mango
    document.write(fruitsArr[fruitsArr.length - 1]); // Prints: Papaya
    document.write("<hr>");
     
    // Loop through all the elements of the fruits array 
    for(var i in fruitsArr) {  
        document.write("<p>" + fruitsArr[i] + "</p>");
    }
    </script>
</body>
</html>

Output :

Apple

Mango

Papaya

Apple

 

Banana

 

Mango

 

Orange

 

Papaya

Karamalshoufi
2022-05-06
788
Easy

Extract a single character from a string using square brackets

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <title>JavaScript Extract a Single Character from a String</title>
</head>
<body>
    <script>
    var str = "Hello World!";
    document.write(str[0] + "<br>"); // Prints: H
    document.write(str[6] + "<br>"); // Prints: W
    document.write(str[str.length - 1] + "<br>"); // Prints: !
    document.write(str[30]); // Prints: undefined
    </script>
</body>
</html>

Output :

H

W

!

undefi ned

Karamalshoufi
2022-05-06
846
Easy

Extract a single character from a string

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <title>JavaScript Extract a Single Character from a String</title>
</head>
<body>
    <script>
    var str = "Hello World!";
    document.write(str.charAt() + "<br>");  // Prints: H
    document.write(str.charAt(6) + "<br>"); // Prints: W
    document.write(str.charAt(30) + "<br>"); // Prints nothing
    document.write(str.charAt(str.length - 1)); // Prints: !
    </script>
</body>
</html>

Output :

H

W

 

!

Karamalshoufi
2022-05-06
853
Easy

Join two or more strings

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <title>JavaScript Join Two or More Strings</title>
</head>
<body>
    <script>
    var hello = "Hello";
    var world = "World";
    var greet = hello + " " + world;
    document.write(greet + "<br>"); // Prints: Hello World
     
    var wish  = "Happy";
        wish += " New Year";
    document.write(wish); // Prints: Happy New Year
    </script>
</body>
</html>

Output :

Hello World

Happy New Year

total contributions (23)

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