integer llFloor(float fval)

Round a float down to the closest integer less than or equal to it.

The float value to be rounded down.

Returns the nearest integer value that is less than or equal to fval.

• The function returns -2147483648 (Hex. 0x80000000) for float values of 2147483648.0 (including Infinity) or bigger, or less than -2147483648.0 (including -Infinity), or NaN.

integer i;
i = llFloor(3.0);    // i will become 3, which is less or equal to 3.0 (in this case, equal).
i = llFloor(3.001);  // i will become 3, not 4, because 4 is greater than 3.001 and the result must be less or equal.
i = llFloor(3.999);  // i will become 3
i = llFloor(4.0);    // i will become 4
i = llFloor(-3.0);   // i will become -3
i = llFloor(-3.001); // i will become -4, which is less or equal to -3.001 (in this case, less)
i = llFloor(-3.999); // i will become -4
i = llFloor(-4.0);   // i will become -4

• llRound rounds to nearest integer.
• llCeil rounds always towards positive infinity (e.g. 1.1 is rounded up to 2.0 and -1.1 is rounded up to -1.0).
• float type and associated caveats and limitations.