Difference between revisions of "LlLog10"

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{{LSL_Function
{{LSL Function
|func_id=264|func_sleep=0.0|func_energy=10.0
|func_id=264|func_sleep=0.0|func_energy=10.0
|func=llLog10|return_type=float|p1_type=float|p1_name=val
|func=llLog10|return_type=float|p1_type=float|p1_name=val
|func_footnote=To get the {{Wikipedia|Natural_logarithm|natural logarithm}} use [[llLog]].<br>llLog10 should only be used where the base 10 log is needed, all other applications should use [[llLog]] instead.
|func_footnote=To get the {{Wikipedia|natural logarithm|w=n}} use [[llLog]].<br/>llLog10 should only be used where the base 10 log is needed, all other applications should use [[llLog]] instead.
|func_desc
|func_desc
|return_text=that is the base 10 {{Wikipedia|Logarithm|logarithm}} of '''val'''.<br/>If '''val''' <= 0 return {{HoverText|zero|0.0}} instead.
|return_text=that is the base 10 {{Wikipedia|logarithm|w=n}} of '''val'''.<br/>If '''val''' <= 0 return {{HoverText|zero|0.0}} instead.
|spec
|spec
|caveats=
|caveats=

Revision as of 13:44, 17 February 2012

Summary

Function: float llLog10( float val );

Returns a float that is the base 10 "Wikipedia logo"logarithm of val.
If val <= 0 return zero instead.

• float val

To get the "Wikipedia logo"natural logarithm use llLog.
llLog10 should only be used where the base 10 log is needed, all other applications should use llLog instead.

Examples

<lsl>default {

 state_entry()
 {
   float num1 = llFrand(100.0);
   llOwnerSay("The base 10 logarithm of " + (string)num1 + " is " + (string)llLog10(num1));
 }
}</lsl>

Notes

There are only two log functions llLog and llLog10. Errors introduced as a result of floating-point arithmetic are most noticable when working with logarithms. llLog should be used instead of llLog10 when converting the base of the logarithm. <lsl>float LogBaseN = llLog(value) / llLog(Base); //This technique introduces errors but is the only way</lsl>

See Also

Functions

•  llLog
•  llPow
•  llSqrt

Articles

•  "Wikipedia logo"Logarithm

Deep Notes

Search JIRA for related Issues

Signature

function float llLog10( float val );