It has been 10+ years since I last programmed my hp-42s, but I am ready to learn again. I was trying to input MVAR (menu variable) as part of a program. Actually, I was trying to input the program as defined on page 193 of the users' manual: "time value of money". I used the pgm.fcn key, tabbed to MVAR, but I assume the next step would be choosing the input variable (like the letter N). An input variable choice is not visible, the only thing showing is the number 4733 in the lower left hand corner. I am stuck with MVAR "_ _ _", waiting for my instructions. Am I inputting the MVAR function incorrectly? Help!
Programming my hp 42s
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