Javascript | Math.sign( ) Function
The Math.sign() is a builtin function in JavaScript and is used to know the sign of a number, indicating whether the number specified is negative or positive.
Syntax:
Math.sign(number)
Parameters: This function accepts a single parameter number which represents the number whose sign you want to know.
Return Value: The Math.sign() function returns five different values as described below:
- It returns 1 if the argument passed is a positive number.
- It returns -1 if the argument passed is a negative number.
- It returns 0 if the argument passed is a positive zero.
- It returns -0 if the argument passed is a negative zero.
- If none of the above cases match,it returns Nan.
Examples:
Input : Math.sign(2) Output : 1 Input : Math.sign(-2) Output : -1 Input : Math.sign(0) Output : 0 Input : Math.sign(-0) Output : -0 Input : Math.sign(haa) Output : NaN
Below programs illustrates the Math.sign() function in JavaScript:
- Example 1: When a positive number is passed as an argument.
<
script
type
=
"text/javascript"
>
document.write(Math.sign(2));
</
script
>
Output:
1
- Example 2: When a negative number is passed as an argument:
<
script
type
=
"text/javascript"
>
document.write(Math.sign(-2));
</
script
>
Output:
-1
- Example 3: When a positive zero is passed as an argument:
<
script
type
=
"text/javascript"
>
document.write(Math.sign(0));
</
script
>
Output:
0
- Example 4: When a negative zero is passed as an argument:
<
script
type
=
"text/javascript"
>
document.write(Math.sign(-0));
</
script
>
Output:
-0
- Example 5: When an invalid number is passed as an argument:
<
script
type
=
"text/javascript"
>
document.write(Math.sign(haa));
</
script
>
Output:
NaN
Supported Browsers: The browsers supported by Javascript Math.sign( ) Function are listed below:
- Google Chrome
- Internet Explorer
- Firefox
- Opera
- Safari