Validation is a check performed by a computer program during data entry. Process that ensures that data accepted for processing is sensible and reasonable
Validation checks - checks a developer of a solution sets/creates, using the software in order to restrict the data that a user can enter, so as to reduce errors
DATA TYPE CHECKS - data being entered is the same type as the data type specified for the field
PRESENCE CHECKS - make sure data has been entered into a field
RANGE CHECKS - performed on numbers, number entered within a certain range
LOOK UP LISTS - when enter data, software looks through list of data until it finds a match along with other important data
FORMAT CHECKS - performed on codes to mkae sure they conform to the correct combination of characters
CHECK DIGITS - numbers are placed at the end of the block of numbers and are used to check that the numbers have been entered correctly into the computer
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