The toupper function will change a character argument from lowercase to uppercase.
<h3>What is toupper function?</h3>
The toupper() function exists utilized to convert the lowercase alphabet to uppercase. i.e. If the character passed exists in a lowercase alphabet then the toupper() function converts a lowercase alphabet to an uppercase alphabet. It exists represented in the ctype. h header file. The toupper() function in C++ converts a provided character to uppercase. It exists defined in the ctype header file.
The toupper() function transforms the lowercase letter c to the corresponding uppercase letter. Both functions return the transformed character. If the character c does not include a corresponding lowercase or uppercase character, the functions return c unchanged.
Hence, The toupper function will change a character argument from lowercase to uppercase.
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