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How to make a number print out up to N decimal numbers

Im trying to make a program to print out a number up to the amount of decimal points the user inputs. I only know the format method which uses % , but how can I use the number its inputted to make the print out ?

25th Jan 2017, 5:27 PM
Carlos Cintron
Carlos Cintron - avatar
2 Respostas
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123.45678 -> %.2f // output: 123.45
2nd Feb 2017, 6:02 AM
Иван Иванов
Иван Иванов - avatar
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yes but what about using a value stored in a variable to know how many spaces it will choose a a decimal. for example the user chose to have 3 decimals and its stored in a variable called decimal how do I write it with that code.
2nd Feb 2017, 1:29 PM
Carlos Cintron
Carlos Cintron - avatar