Data Validation
Unit 2 Summary - part 5
Range Check
Bank/Money Validation coding:​
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Line 5 is to make sure no one inputs any negative numbers.
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​Line ​7 is to make sure no one withdraws bigger amounts than their savings.
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Line 9 is to make sure no one withdraws more than $5000 a day.
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Line 2 asks how much users want to withdraw.
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If you input $21000, which message do you receive?​
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Computer executes from top to bottom (based on algorithm), so if we input $21000, it shows line 8's message.
Length Check
Password Change Validation coding:​
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Line 3 is to make sure users input at least 8 characters. If they do, the password is successfully changed.
Type Check
Empty/NULL Validation coding:​
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Line 2 is for people who press the Enter key without typing any menu.
Login Password Validation coding:​
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Line 1 is a list of usernames, they all have the same password in line 6.
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Line 2: if the username is in the list, line 6 will make sure no one can enter if they input the wrong password.
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Line 9 is to make sure no one can enter if their username is not in the list.​
