ValidationAlgorithm - The process of checking input data to ensure it is reasonable and conforms to expected rules.A step-by-step set of instructions to solve a specific problem or perform a task., Verification - A check to ensure that the data entered is exactly what the user intended, typically using methods like double-entry or visual checks., Presence Check - Ensures that data has been entered and is not left blank., Length Check - Checks that the input data is neither too short nor too long., Range Check - Verifies that a number falls within a specified range., Type Check - Checks that the data entered is of the correct type (e.g., integer, string)., Format Check - Ensures the data is in the correct format, such as an email address or postcode., Check Digit - A digit added to a number to help verify that the number has been entered correctly., LoopBased Reentry - Uses WHILE or REPEAT loops to prompt the user again until a valid input is entered., Boolean Flag - A variable used to track whether a validation condition has been met., Double Entry Check - Requires the user to enter data twice and checks for a match to ensure accuracy., Visual Check - User visually inspects the entered data and confirms it is correct before proceeding., Range Check Example - WHILE Age < 0 OR Age > 120 DO INPUT Age, Length Check Example - WHILE LENGTH(Name) < 6 OR LENGTH(Name) > 10 DO INPUT Name, Type Check Example - IF Type(Length, Integer) THEN OUTPUT 'Valid number' ELSE OUTPUT 'Invalid', Format Check Example - IF Username.isalpha() THEN OUTPUT 'Valid - all letters', Robustness - The ability of a program to handle unexpected or incorrect input gracefully., User Prompt - A message that guides the user to enter input correctly., Feedback Message - Displayed when invalid data is entered, guiding the user to correct the input.,

Unit 8 Algorithms - T5 Validation & Verification - Crossword

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