Function y=[x] (integer part of number)

Recall, that `[x]` is the biggest integer that is less or equal than x. For example, `[0.1]=0,[1.9]=1,[-1.4]=-2`.function y=[x]

If `0<=x<1`, then `y=[x]=0`; if `1<=x<2`, then `y=[x]=1`; if `2<=x<3`, then `y=[x]=2` etc.

Graph of the function `y=[x]` is shown. Note, that there are hole points: this means that, for example, near point 1 from left, i.e. at points, 0.8, 0.9, 0.99 etc. [x] equals 0, but at point 1 it is not 0, it is 1. In other words function "jumps".