How to output specified decimal places in python

Method 1: round(X, N)

This method is not strictly valid. When the number of decimal places in X is n

Method 2: print('%.Nf'%X) or print("%.Nf"%X)

Note that this method has two There are "%" and no ",".

Method 3: print(format(X, '.Nf') or print(format(X, ".Nf")

Pay attention to this method There is no "%", but there is ",".

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