Where is the syntax error in this python code?

Question

I'm getting a syntax error on the last line - line 14. I can't see why though, as it seems to be a simple print statement.

cel = "c"
far = "f"
cdegrees = 0
fdegrees = 0
temp_system = input ("Convert to Celsius or Fahrenheit?")
if temp_system == cel:
    cdegrees = input ("How many degrees Fahrenheit to convert to Celsius?")
    output = 5/9 * (fdegrees - 32)
    print "That's " + output + " degrees Celsius!"
elif temp_system == far:
    fdegrees = input ("How many degrees Celsius to convert to Fahrenheit?")
    output = (32 - 5/9) / cdegrees
    print "That's " + output + " degrees Fahrenheit!"
else print "I'm not following your banter old chap. Please try again."

Please always include the complete traceback of the error.

Sven Marnach
– Sven Marnach

2012-04-12 15:28:22 +00:00
Commented Apr 12, 2012 at 15:28 — Sven Marnach
– Sven Marnach, Commented Apr 12, 2012 at 15:28

jamylak · Accepted Answer · 2012-04-12 16:11:53Z

9

You forgot the colon (:) after the last else.

Also:

input ("Convert to Celsius or Fahrenheit?")

should be changed to

raw_input ("Convert to Celsius or Fahrenheit?")

as input() tries to evaluate its input while raw_input takes a 'raw' string. When you enter c for example into the input() it tries to evaluate the expression c as if it were python code which looks for a variable c whereas raw_input simply takes the string without attempting to evaluate it.

Also you cannot concatenate(add together) strings with integers as you are doing in this case where output is a number.

Change it to

print "That's " + str(output) + " degrees Celsius!"

or

print "That's %d degrees Celsius!" % output

edited Apr 12, 2012 at 16:11

answered Apr 12, 2012 at 15:27

jamylak

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3 Comments

Calydon Over a year ago

Thanks - I didn't realize the : was optional. I'm still getting errors in this simple program though. I want to pick celsius so after the first input prompt I enter: c. Traceback (most recent call last): File "<stdin>", line 5, in <module> File "<string>", line 1, in <module> NameError: name 'c' is not defined Didn't I define this at the start?

Calydon Over a year ago

Thank you! I've learned about 4 things from this one answer. :)

jamylak Over a year ago

No problem. I'm surprised nobody wrote it out before me but everyone just assumed it was the one else statement.

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