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functions:llsqrt [2014-05-21 11:27 SLT] sei created |
functions:llsqrt [2015-02-04 18:10 SLT] (current) sei style |
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| ===== Function: llSqrt ===== | ===== Function: llSqrt ===== | ||
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| </code> | </code> | ||
| - | Return the square root of the argument, that is, the number that multiplied by itself gives the argument. | + | Return the square root of the argument, that is, a number such that when multiplied by itself, results in the given argument. |
| ===== Parameters ===== | ===== Parameters ===== | ||
| === fval === | === fval === | ||
| - | The [[types/float]] value to take the square root of. | + | The $lty[float] value to take the square root of. |
| - | ===== Result ===== | + | ===== Return value ===== |
| - | The square root of the given float. | + | The square root of the given $ty[float]. |
| ===== Notes ===== | ===== Notes ===== | ||
| - | * If you need the square root of 2, using [[constants/SQRT2]] instead of calling this function will save code and processing time. | + | * If you need the square root of 2, using $lct[SQRT2] instead of calling this function will save code and processing time. |
| - | * Any value less than zero will return **NaN** under Mono and crash with a math error under LSO. | + | * An input of -0.0 will return -0.0. |
| + | * Any value less than zero will return $nan. | ||
| ===== Short examples ===== | ===== Short examples ===== | ||
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| <code lsl2> | <code lsl2> | ||
| float f; | float f; | ||
| - | f = llSqrt(4); // sets f to 2.0 because 2*2=4 | + | f = llSqrt(4); // sets f to 2.0 because 2*2=4 |
| f = llSqrt(25); // sets f to 5.0 because 5*5=25 | f = llSqrt(25); // sets f to 5.0 because 5*5=25 | ||
| + | f = llSqrt(2); // sets f to approx. 1.414214, which multiplied by itself gives approx. 2 | ||
| + | f = SQRT2; // same as above, but more efficient | ||
| f = llSqrt(-1); // sets f to NaN (Not a Number) under Mono; crashes under LSO | f = llSqrt(-1); // sets f to NaN (Not a Number) under Mono; crashes under LSO | ||
| </code> | </code> | ||
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| ===== See also ===== | ===== See also ===== | ||
| - | * [[llPow]] raises a number to any power. | + | * $lfn[llPow] raises a number to any power. |
| - | * [[constants/SQRT2]] is a constant with the square root of 2. | + | * $lct[SQRT2] is a constant with the square root of 2. |
| + | * $lty[float] type and associated caveats and limitations. | ||