Another feature of IFs is the Computations button. Computations allow users to create a formula of variables in that correlate historic data with forecasted data, format data for uniform analysis or that provide for interesting combinations of variables that are not directly available in IFs.
For example, you know that there is a variable used in IFs called LIT – percentage of population who are literate, but you need to know the absolute number of literate people in each country, not just the percentage. If you would like to compute from the Self Managed Variable/Parameter screen, you have two options: create computations "on the fly", or create algebraic computations .