C++ String Functions

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Kenny Yip Coding

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Published on February 21, 2025 12:49:33 PM ● Video Link: https://www.youtube.com/watch?v=ii96TL5al4M

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String functions in C++. So far, we've gone over how to access, append, remove, and update characters within a string. Outside of these methods, we can utilize the built-in cctype library in C++ to classify and transform characters within a string. Specifically, we will be using the tolower and toupper functions to convert a character to lowercase or uppercase. We will use this to create a program that checks an input username that is case insensitive. In addition, we will use the islower, isupper, isdigit, isalnum functions to create a program for verifying whether or not a password meets character requirements.

If you need to review past C++ Topics:
Useful Math Functions:    • C++ Useful Math Functions  
Break and Continue:    • C++ Break and Continue Statements  
Strings and C Strings:    • C++ String and C Strings  


List of string character functions in the ctype library:
https://cplusplus.com/reference/cctype/

C++ Playlist:
   • C++ Tutorial  

Install C++ with VS Code:
   • How to set up C++ in Visual Studio Code  

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