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| Function | Decadic logarithm: Pascal/Delphi only! |
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| Syntax | uses xmath;
function log10( x:Extended x ): Extended;
function log10d( x:double x ): Double; |
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| Description | The logarithm of the argument to the basis 10 is calculated and the result returned. |
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| Error handling | A DOMAIN error with NAN ("not-a-number") as return value results from x < 0 (including −0). A SING error with -HUGE_VAL as return value results from x=0. |
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| Return value | The decadic logarithm of the argument is returned. |
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