JavaScript String fromCharCode()

// use of fromCharCode()
let string1 = String.fromCharCode(72, 69, 76, 76, 79);

// printing the equivalent characters
console.log(string1);

// Output:
// HELLO

fromCharCode() Syntax

The syntax of the fromCharCode() method is:

String.fromCharCode(num1, ..., numN)

The fromCharCode() method, being a static method, is called using the String class name.

fromCharCode() Parameters

The fromCharCode() method takes in :

• num1, ..., numN - A sequence of UTF-16 code units (numbers between 0 and 65535). Numbers greater than 65535 (0xFFFF) are truncated.

fromCharCode() Return Value

• Returns a string of length N consisting of the N specified UTF-16 code units.

Example 1: Using fromCharCode() method

// use of fromCharCode()
let string1 = String.fromCharCode(72, 69, 76, 76, 79);

// printing the equivalent characters
console.log(string1);

Output

HELLO

In the above example, we have called fromCharCode() method through the String constructor object and assigned it to the string1 variable.

The fromCharCode() concatenates the characters converted from the given UTF-16 code unit. That means, unicode value 72 is converted to H, 69 to E, 76 to L, 79 to O and later concatenated into a string HELLO.

Example 2: Using fromCodePoint() Method With Hexadecimal Value

// numbers can be passed as a hexadecimal value
let string2 = String.fromCharCode(0x2017);

console.log(string2); 

Output

‗

In the above example, we have passed a hexadecimal value 0x2017 whose decimal equivalent is 8215. The unicode point value 8215 is converted to a character ‗.

The string2 holds the return value of the fromCharCode(0x2017), which is ‗.

Note: If any of the unicode values are not representable in a single UTF-16 code unit, we can use fromCodePoint() method.

Recommended Reading:

• JavaScript String charCodeAt()