checking input from user

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pavikirthi
pavikirthi 2015-10-27
评论： pavikirthi 2015-10-29
How to check the value entered by the user is a valid integer.For example: 2, 3,10 etc and not invalid value such as negative value(example:-3, -7, -10) or decimal value(example:0.14,3,1,-7,2,-0.4) or a character/special symbol (example: a, @,&, hi)

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Chad Greene
Chad Greene 2015-10-27
To see if x is an integer greater than or equal to zero,
all([mod(x,1)==0 x>=0])
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Chad Greene
Chad Greene 2015-10-27
Ah, yes, I missed that part.
all([mod(x,1)==0 x>=0 isnumeric(x)])

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