Oke, I don''t understand it complety. return not arg%2 Why use not here ? I think that arg%2 is True not makes it false. Another question. How can I round outcome of a calculation. round ( ( t-32)/1.8) does not work because I get a message that there are two arguments. Outcome = (t-32)/1.8 outcome2 = round (outcome) does not work because the argument must be a string or a number Roelof
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