Javascript Number() Function
Below is the example of the Number() function.
- Example:
<script>
// JavaScript to illustrate
// Number() function
function
func() {
// Original string
var
a =
true
;
var
value = Number(a);
document.write(value);
}
// Driver code
func();
</script>
- Output:
1
The Number() function is used to convert data type to number.
Syntax:
Number(object)
Parameters: This function accept a single parameter as mentioned above and described below:
object: This parameter holds the objects that will be converted any type of javascript variable to number type.
Return Values: Number() function returns the number format for any type of javascript variable.
Below examples illustrate the Number() function in JavaScript:
- Example 1:
Input : Number(true); Number(false); Output : 1 0
- Example 2: Not a number is returned by the compiler.
Input : Number("10 20"); Output: NaN
- Example 3: The Number() method above returns the number of milliseconds since 1.1.1970.
Input : Number(new Date("2017-09-30")); Output : 1506729600000
- Example 4:
Input : Number("John"); Output : NaN
More example codes for the above function are as follows:
Program 1:
<script> // JavaScript to illustrate Number() function function func() { // Original string var a = "10 20" ; var value = Number(a); document.write(value); } // Driver code func(); </script> |
Output:
NaN
Program 2:
<script> // JavaScript to illustrate Number() function function func() { var value = Number( new Date( "2017-09-30" )); document.write(value); } // Driver code func(); </script> |
Output:
1506729600000
Program 4:
<script> // JavaScript to illustrate Number() function function func() { var value = Number( "John" ); document.write(value); } // Driver code func(); </script> |
Output:
NaN
Supported Browsers:
- Google Chrome
- Firefox
- Internet Explorer
- Safari
- Opera