isInfinity

The isInfinity function checks if a value is positive or negative infinity.

Syntax

isInfinity(value)

Parameters

Name	Type	Description
value	number	Value to be checked.

Return Value

Type	Description
boolean	true if the value is Infinity or -Infinity, else false.

Examples

isInfinity(Infinity);  // true
isInfinity(-Infinity); // true
isInfinity(10);        // false

Notes

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

References

• MDN: Infinity