addition
Summary
Adds the value of one numeric expression to another, or concatenates two strings.
Syntax
result = expression1 + expression2;
- result
- Any variable.
- expression1
- Any expression.
- expression2
- Any expression.
Examples
console.log(1 + 1); // 2
console.log('hello' + ' world'); // 'hello world'
console.log(1 + '1'); // '11'
console.log('1' + 1); // '11'
Remarks
The types of the two expressions determine the behavior of the + operator.
| If | Then |
|---|---|
| Both expressions are numeric or Boolean | Add |
| Both expressions are strings | Concatenate |
| One expression is numeric and the other is a string | Concatenate |
See also
Other articles
Attributions
Microsoft Developer Network: Article