JavaScript String()
Syntax & Examples

String constructor

The `String` constructor creates a new String object. It performs type conversion when called as a function, rather than as a constructor, which is usually more useful.

Syntax of String

The syntax of String.String constructor is:

new String(thing)
String(thing)

This String constructor of String creates a new String object. It performs type conversion when called as a function, rather than as a constructor, which is usually more useful.

Parameters

ParameterOptional/RequiredDescription
thingrequiredThe value to convert to a string.

Return Type

String.String returns value of type String.


✐ Examples

1 Convert number to string

In this example,

  1. We create a variable num with the value 42.
  2. We use the String() constructor to convert it to a string.
  3. We then log the string representation to the console.

JavaScript Program

void main() {
  let num = 42;
  let str = String(num);
  console.log('String representation of num:', str);
}

Output

String representation of num: 42

2 Convert character to string

In this example,

  1. We create a variable char with the value 'A'.
  2. We use the String() constructor to convert it to a string.
  3. We then log the string representation to the console.

JavaScript Program

void main() {
  let char = 'A';
  let str = String(char);
  console.log('String representation of char:', str);
}

Output

String representation of char: A

3 Convert array to string

In this example,

  1. We create an array arr with values [1, 2, 3].
  2. We use the String() constructor to convert it to a string.
  3. We then log the string representation to the console.

JavaScript Program

void main() {
  let arr = [1, 2, 3];
  let str = String(arr);
  console.log('String representation of array:', str);
}

Output

String representation of array: 1,2,3

Summary

In this JavaScript tutorial, we learned about String constructor of String: the syntax and few working examples with output and detailed explanation for each example.