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#JavaScript
#JavaScript / Functions / Number() / Function that converts a string to a number
Number()
Number() is a function that converts a string to a number.
Grammar
Number( object )- object: Enter a string or a variable whose value is a string.
- Returns NaN for values that cannot be converted to a number.
example
- The value of variable c is 12, which is character 1 plus character 2.
- The value of variable d is 3, which is the addition of number 1 and number 2.
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>JavaScript</title>
<style>
body {
font-family: Consolas;
}
</style>
</head>
<body>
<script>
var a = '1';
var b = '2';
var c = a + b;
var d = Number( a ) + Number( b );
document.write( '<h1>c : ' + c + '</h1>' );
document.write( '<h1>d : ' + d + '</h1>' );
</script>
</body>
</html>TIP.
Use the String() function to convert numbers to strings.
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