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floor

Purpose
Round a number to the next smallest integer.
Synopsis
function floor(r:real):integer
Argument
r 
Real number to be rounded
Return value
Rounded value.
Example
In the following, i takes the value 5, j the value -7, and k the value 12: 
i := floor(5.6)
j := floor(-6.7)
k := floor(12.3)
Further information
Although this function returns an integer, an implementation working on reals will be used when it is called in an expression over reals ( e.g. 1.0+floor(x)). It is also possible to force this selection by casting the result of the operation ( e.g. real(floor(x))): this can be necessary if the result is too large to be represented by an integer or if the function is used in isolation.
Related topics
ceil, round.

Parent Topic Predefined functions and procedures

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