Question about user input error
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I have a simple piece of code that requires the input of a number. I want to prevent the user from accidentally enters a letter. I tried a while loop using intnan, but I'm stuck.
回答（1 个）
John BG
2016-1-29
0 个投票
try converting all inputs with uint.
If the return value of any input character does not belong to uint64('0123456789') then reject it, show a message or whatever you want to do.
John
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2016-1-29
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