What is an identifier?
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Answer / Vandana Singh
An identifier is a name given to variables, functions, and other programming constructs in C. Identifiers are used to uniquely identify each item in the program. They must follow certain naming rules such as starting with an alphabet or underscore, containing only alphabets, digits, and underscores, and not being a reserved keyword.
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Given a number N, product(N) is the product of the digits of N. We can then form a sequence N, product(N), product(product(N))… For example, using 99, we get the sequence 99, 99 = 81, 81 = 8. Input Format: A single integer N Output Format: A single integer which is the number of steps after which a single digit number occurs in the sequence. Sample Test Cases: Input #00: 99 Output #00: 2 Explanation: Step - 1 : 9 * 9 = 81 Step - 2 : 8 * 1 = 8 There are 2 steps to get to this single digit number. Input #01: 1137638147
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