Must I convert a number to a string; print "The value of pi is around " + str(3.14), while I can as well write this; print “The value of pi is around 3.14” ? I don’t see the essence
Conversion is necessary to permit concatenating.
>>> number = 42 >>> "string " + number Traceback (most recent call last): File "<pyshell#1>", line 1, in <module> "string " + number TypeError: cannot concatenate 'str' and 'int' objects >>> "string " + str(number) 'string 42' >>> from math import pi >>> "The value of pi is " + str(pi) 'The value of pi is 3.14159265359' >>>
But both of them have the same output
That’s because of the literal expression. Notice the example above uses a math constant.
Oh, okay, I now get it , Thank you.