isinf()

Returns whether the input is an infinite (positive or negative) value.

Syntax

isinf(number)

Learn more about syntax conventions.

Parameters

Name	Type	Required	Description
number	real	✔️	The value to check if infinite.

Returns

true if x is a positive or negative infinite and false otherwise.

Example

Run the query

range x from -1 to 1 step 1
| extend y = 0.0
| extend div = 1.0*x/y
| extend isinf=isinf(div)

Output

x	y	div	isinf
-1	0	-∞	true
0	0	NaN	false
1	0	∞	true

Related content

• To check if a value is null, see isnull().
• To check if a value is finite, see isfinite().
• To check if a value is NaN (Not-a-Number), see isnan().