isnan

The isnan function returns whether input is Not-a-Number (NaN) value.

Syntax

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    isnan( X )

Arguments

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• X: A real number.

Results

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A non-zero value (true) if X is NaN, and zero (false) otherwise.

Examples

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This returns false:

print isnan( 42 )

This returns true:

print x = toint( 'pizza' )
| extend y = isnan( x )