For how many real values of $k$ do we have $|3-ki| = 0$?
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
For how many real values of $k$ do we have $|3-ki| = 0$?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
0
For how many real values of $k$ do we have $|3-ki| = 0$?
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