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IsInfinite function

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Fully qualified name: Std.Math.IsInfinite

function IsInfinite(d : Double) : Bool

Summary

Returns whether a given floating-point value is either positive or negative infinity.

Input

d

The floating-point value to be checked.

Output

true if and only if d is either positive or negative infinity.

Remarks

NaN is not a number, and is thus neither a finite number nor is it infinite. As such, IsInfinite(0.0 / 0.0) returns false. To check if a value is NaN, use IsNaN(d).

Note that even though this function returns true for both positive and negative infinities, these values can still be discriminated by checking d > 0.0 and d < 0.0.

Example

Message($"{IsInfinite(42.0)}"); // false
Message($"{IsInfinite(0.0 / 0.0)}"); // false
Message($"{IsInfinite(-1.0 / 0.0}"); // true

See Also

  • Microsoft.Quantum.Math.IsNaN