Comparing numbers give the wrong result in Python

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余生分开走
余生分开走 2020-11-29 12:59

If I enter any value less than 24, it does print the \"You will be old...\" statement. If I enter any value greater than 24 (ONLY up to 99), it prints the \"you are old\" st

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  •  迷失自我
    2020-11-29 13:13

    You're testing a string value myAge against another string value '24', as opposed to integer values.

    if myAge > ('24'):
         print('You are old, ' + myName)
    

    Should be

    if int(myAge) > 24:
        print('You are old, {}'.format(myName))
    

    In Python, you can greater-than / less-than against strings, but it doesn't work how you might think. So if you want to test the value of the integer representation of the string, use int(the_string)

    >>> "2" > "1"
    True
    >>> "02" > "1"
    False
    >>> int("02") > int("1")
    True
    

    You may have also noticed that I changed print('You are old, ' + myName) to print('You are old, {}'.format(myName)) -- You should become accustomed to this style of string formatting, as opposed to doing string concatenation with + -- You can read more about it in the docs. But it really doesn't have anything to do with your core problem.

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