Is there a way to check case sensitivity on the value I pass in?

Hello,

Is there a way to check case sensitivity on the value I pass in?

Also, is there any other way to check the data type of the value?
For example,

 1) Want to check if the value corresponding to the date type is actually using the date type correctly?
 2) Want to check whether the value corresponding to the string type uses only uppercase letters, only lowercase letters, and whether special symbols are combined.

Thank you.