In some programming languages an identifier must begin with a letterfollowed by any number (or none) of letters and digits. How many differentidentifiers are there having four or fewer characters?

Identifier is the name used to find a variable, function, class or other objects. All identifiers…

Answered: In some programming languages an…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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In some programming languages an identifier must begin with a letter followed by any number (or none) of letters and digits. How many different identifiers are there having four or fewer characters?