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#
Authors:
Y Daniel Lang
Chapter:
Programming
Exercise:
Check Point
Question:18 | ISBN:978013274719 | Edition: 6

Question

Are the following statements correct? If so, show their printout.
value = 4.6
print(int(value))
print(round(value))
print(eval("4 * 5 + 2"))
print(int("04"))
print(int("4.5"))
print(eval("04"))

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Answer

The correct and incorrect statements with their output:  

Python 3.2.1 (default, Jul 10 2011, 21:51:15) [MSC v.1500 32 bit (Intel)] on win32
Type "copyright", "credits" or "license()" for more information.
>>> value = 4.6
>>> print(int(value))
4
>>> print(round(value))
5
>>> print(eval("4 * 5 + 2"))
22
>>> print(int("04"))
4
>>> print(int("4.5"))
Traceback (most recent call last):
  File "<pyshell#5>", line 1, in <module>
    print(int("4.5"))
ValueError: invalid literal for int() with base 10: '4.5'
>>> print(eval("04"))
Traceback (most recent call last):
  File "<pyshell#6>", line 1, in <module>
    print(eval("04"))
  File "<string>", line 1
    04
     ^
SyntaxError: invalid token
>>>

 

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