isfinite

The isfinite function returns whether input is a finite value (is neither infinite nor NaN).

Syntax

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    isfinite( X )

Arguments

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• X: A real number.

Results

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

Examples

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This returns true:

print isfinite( 420 )

This returns false:

print isfinite( hello )