Design a program that will calculate and display a letter grade for a student given their test score and the number possible. Convert the score to a percentage and then use the following curve to assign a grade. Implement in Scratch and Raptor. Percent Score Grade Percent >= 90  'A' 90 > Percent >= 80 'B' 80 > Percent >= 70 'C' 70 > Percent >= 60 'D' 60 > Percent  'F'

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Variables and Constant

Constants and variables are widely used in mathematical equations and expressions. They are also commonly found in the domain of programming, where each language has its own way to differentiate between a constant and a variable. Since they have all sorts of applications, knowing their differences is a good place to start.