33 lines
629 B
Markdown
33 lines
629 B
Markdown
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# MathIsValidNumber
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It checks the correctness of a real number.
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```
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bool MathIsValidNumber(
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double number // number to check
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);
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```
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Parameters
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number
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[in] Checked numeric value.
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Return Value
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It returns true, if the checked value is an acceptable real number. If the checked value is a plus or minus infinity, or "not a number" (NaN), the function returns false.
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Example:
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```
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double abnormal=MathArcsin(2.0);
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if(!MathIsValidNumber(abnormal)) Print("Attention! MathArcsin(2.0) = ",abnormal);
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```
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See also
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[Real types (double, float)](/en/docs/basis/types/double)
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