Validation Checks

Validation Checks

1. Arithmetic functions

   • Random
   • Range
   • Round
   • Truncation
     • To truncate something is to shorten it, or cut part of it off. In computer science, the term is often used in reference to data types or variables, such as floating point numbers and strings.

2. String Handeling

   • Concatenation
     • Joining character strings end-to-end
   • Length
   • Position
   • String conversion
     • Integer/float to string
     • String to integer/float

3. General functions

   • Input
   • Open
   • Print
   • Range

4. Range check

   • Checks the data falls between an acceptable upper and lower value, within a set range

5. Type check

   • Checks that the data entered is of an expected type, e.g. text or a number

6. Check digit

   • An extra digit added to a number which is calculated from the other digits, this ensures the rest of the number has been entered properly

7. Length check

   • Checks the number of characters meets expectations, e.g. an 8 character password

8. Presence check

   • Checks that the user has at least inputted something, stopping them from accidentally entering nothing