People sometimes write this as {{MATH_97}}, where those funny symbols mean exactly the words above describing the function. For your viewing pleasure, here is a graph of the greatest integer function: {{CMD_98}} {{ENV_99}} {{COMMENT_100}} {{COMMENT_101}} {{COMMENT_102}} {{COMMENT_103}} {{CMD_104}} Observe that here we have multiple inputs that give the same output. This is not a problem! To be a function, we merely need to check that for each input, there is exactly one output, and this condition is satisfied. {{CMD_105}}