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Scientific calculators have always have that comma or momayyez symbol. Mine, a CASIO fx-85ES PLUS, have it located at SHIFT + ). And everytime I think I'm using it correctly, it says syntax error, and the cursor jumps to whatever is before it.
My question is, how is that symbol used in some mathematical formula input in scientific calculators?
I think I need to add an " equals to something " before the symbol. But i cannot find any "equals to" sign ina ny calculators. Whoch led me to believe, it's there used as a multiple variable setter (like x = 1, -2).