JavaScript: Convert ASCII to Hexadecimal format

JavaScript String: Exercise-27 with Solution

Write a JavaScript function to convert ASCII to Hexadecimal format.

ASCII (Listeni/ˈæski/ ass-kee), abbreviated from American Standard Code for Information Interchange, is a character encoding standard. ASCII codes represent text in computers, telecommunications equipment, and other devices. Most modern character-encoding schemes are based on ASCII, although they support many additional characters.

Test Data:
console.log(ascii_to_hexa('12'));
console.log(ascii_to_hexa('100'));
Output:
"3132"
"313030"

Sample Solution:

JavaScript Code:

// Define a function named ascii_to_hexa that takes a string parameter str
function ascii_to_hexa(str)
{
    // Initialize an empty array to store the hexadecimal values
    var arr1 = [];
    
    // Iterate through each character in the input string
    for (var n = 0, l = str.length; n < l; n++)
    {
        // Convert the ASCII value of the current character to its hexadecimal representation
        var hex = Number(str.charCodeAt(n)).toString(16);
        
        // Push the hexadecimal value to the array
        arr1.push(hex);
    }
    
    // Join the hexadecimal values in the array to form a single string
    return arr1.join('');
}

// Call the ascii_to_hexa function with different input strings and log the results to the console
console.log(ascii_to_hexa('12'));
console.log(ascii_to_hexa('100'));

Output:

3132
313030

Explanation:

The above JavaScript code defines a function named 'ascii_to_hexa()' which converts a given string into its hexadecimal representation. Here's a brief explanation of each part of the code:

• 'function ascii_to_hexa(str)': Defines a function named 'ascii_to_hexa' that takes a string parameter 'str'.
• 'var arr1 = [];': Initializes an empty array 'arr1' to store the hexadecimal values.
• 'for (var n = 0, l = str.length; n < l; n++)': Iterates through each character in the input string 'str'.
• 'var hex = Number(str.charCodeAt(n)).toString(16);': Converts the ASCII value of the current character to its hexadecimal representation using the 'toString(16)' method.
• 'arr1.push(hex);': Adds the hexadecimal value to the 'arr1' array.
• 'return arr1.join('');': Joins the hexadecimal values in the array to form a single string and returns it.
• 'console.log(ascii_to_hexa('12'));': Calls the 'ascii_to_hexa' function with the input string ''12'' and logs the result to the console.
• 'console.log(ascii_to_hexa('100'));': Calls the 'ascii_to_hexa' function with the input string ''100'' and logs the result to the console.

Flowchart:

Live Demo:

See the Pen JavaScript Convert ASCII to Hexadecimal format - string-ex-27 by w3resource (@w3resource) on CodePen.

ASCII Chart

Extended ASCII Chart [character code 128-255] (ISO 8859-1)

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