JavaScript Glossary: String concat()

Celý článek

Basics

This method is used to join the calling string and the provided string arguments. It returns a new String object containing the calling string and the provided arguments . If no arguments are provided, it returns the original calling string.

"Hello".concat(" World")
// "Hello World"

https://scotch.io/embed/gist/3586da5ad6ad7198f909cdcfaf95687e

The concat() method:

• Takes values as parameters
• Appends specified parameters to parent String.
• Returns a new String containing the provided arguments and the calling string.
• If no argument is provided, it returns the original string.

Syntax

oldString.concat(newString2, newString3,...newStringN)

1 Parameter

newString2...newStringN These are values to be joined to the parent String. This can be a number values passed as arguments.

Returns a string

The method will return a String containing the parent String and the values specified as arguments. If no arguments are provided, it will return the calling string object.

Common Uses and Snippets

Convert numbers to a String

The concat() method can be used to convert number arguments into a single string containing all the numbers in the same order as the argument.

https://scotch.io/embed/gist/5d8dc2e4584e2632c66c9f10e5e23e12