how to check if a value is a floating point or not

[nicholascannon1]

I am making a calculator and i need it to support floating point values but i 
am using the function isnumeric to check if the user has entered an int value. 
I need the same for floating point types so i could implement an or in the if 
statement that checks the values the user has entered and allow it to check and 
use floating points. If you need the source code i am happy to give it to you. 
Thank you for your help
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