Web Reference: Validating a string in C generally refers to checking if the string meets certain criteria or contains specific types of characters. The nature of the validation depends on your specific requirements. Jan 16, 2023 ยท In C please do not attempt to compare or test a string with ==. The name will never be equal to letter. You need the input string's length to be more than 1, and it cannot have every character as isdigit(). When users enter data into a C program, they might type something unexpected. Input validation makes sure the input is correct before the program continues. Without validation, your program might crash or give the wrong result! The examples below show simple ways to check if the user's input is valid in C.
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