1. A device, comprising: one or more hardware processors to: obtain program code; determine a plurality of variables based on the program code; at least one of: execute the program code; or analyze the program code; determine values of the plurality of variables based on the at least one of executing or analyzing of the program code; determine a range for each variable based on positions of at least one significant digit for the values, the range being determined based on a count of a quantity of occurrences of the at least one significant digit for the values; determine relationships between the plurality of variables based on the at least one of the executing or analyzing of the program code; determine one or more effects on the range for the plurality of variables based on the relationships between the plurality of variables; generate a visualization that presents the range for the plurality of variables, the relationships between the plurality of variables, and the one or more effects on the range for the plurality of variables; and provide the visualization for display.