isNegative

The isNegative function checks if a number is negative.

Syntax

isNegative(value)

Parameters

Name	Type	Description
value	number	Number to be checked.

Return Value

Type	Description
boolean	true if the number is negative, else false.

Examples

isNegative(-5); // true
isNegative(0);  // false
isNegative(10); // false

Notes

• Throws a TypeError if the value is not a number.
• Useful for mathematical and logical validations.

References

• MDN: Arithmetic operators