Please explain print("%.2f" % total)


#1



I got the answer right but not with this code


#2

The unit on Strings and Console Output introduces string formatting with the modulo operator. This is not a math operation, but symbolic for placeholder with data type specified.

%___

This is the placeholder, which must be accompanied by a data type. Eg.

 > a = 4
 > print "%" % a
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: incomplete format

Common type specifiers

s # string
r # representation (can be an expression or object)
d # decimal integer
b # binary integer
f # float

There are other presentation types listed in the documentation for Python 2.x.x.

To specify the number of decimal places to represent in a float, we use the dot integer modifier:

"%.4f"    # will include up to four decimal places, rounded using the 4/5 rule.

 > from math import pi
 > print "%.4f" % pi
 3.1416

#3

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