The sign()
method computes the sign of the specified number and returns 1 if the number is positive and -1 if it's negative.
Example
// sign() with a positive number
let value = Math.sign(126);
console.log(value);
// Output: 1
sign() Syntax
The syntax of the Math.sign()
method is:
Math.sign(number)
Here, sign()
is a static method. Hence, we are accessing the method using the class name, Math
.
sign() Parameter
The Math.sign()
method takes a single parameter:
number
- value whose sign is to be determined
sign() Return Value
The sign()
method returns:
- 1 if the argument is positive
- -1 if the argument is negative
- NaN (Not a Number) for a non-numeric argument
Example 1: JavaScript Math.sign()
// sign() with negative argument
let value1 = Math.sign(-27);
console.log(value1);
// sign() with positive argument
let value2 = Math.sign(16);
console.log(value2);
// Output:
// -1
// 1
Here, the Math.sign()
returns
- -1 - for the negative number
-27
- 1 - for the positive number
16
Example 2: Math.sign() with Non-Numeric Arguments
let string = "Harry";
// sign() with non-numeric argument
let result = Math.sign(string);
console.log(result);
// Output: NaN
In the above example, we have used the Math.sign()
method with a string value "Harry"
. Hence, we get NaN as output.
Example 3: Math.sign() with Zero Values
// sign() with negative zero
let value1 = Math.sign(-0);
console.log(value1);
// Output: -0
// sign() with positive zero
let value2 = Math.sign(0);
console.log(value2);
// Output: 0
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