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

Unit 8 Algorithms - T5 Validation & Verification - Flash Cards

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