How to Convert a Number to a String in JavaScript
There are several built-in methods in JavaScript that convert from an number data type to a String. Let’s discuss each of them.
toString()
The toString() method takes an integer or floating point number and converts it into a String type. There are two ways of invoking this method. If the base number is passed as a parameter to toString(), the number will be parsed and converted to it:

String()
The String() method creates a primitive String type for the number passed to it:

The difference between the String() method and the String method is that the latter does not do any base conversions.
How to Convert a Number to a String in JavaScript
The template strings can put a number inside a String which is a valid way of parsing an Integer or Float data type:

Template literals are string literals that allow embedded expressions. Multi-line strings and string interpolation features can be used with template literals.
Concatenating an Empty String
This method is considered one of the fastest way of converting a number into string.

However, be careful as this method sometimes may not return the preferable string:

The speed of these above methods differs by browsers.