devxlogo

Changing a Character’s Case

Changing a Character’s Case

Question:
Is there a function that can convert upper case to lower case and vice-versa?

Answer:
The toupper() and tolower() functions are declared in the standard header. Each of them takes a character and returns it uppercase or lowercase version, respectively. For example:

#include char low = 'a', up;up = toupper(low); //up is now 'A'

You need to pass every character in the string to either function to make the string all uppercase or lowercase.

devxblackblue

About Our Editorial Process

At DevX, we’re dedicated to tech entrepreneurship. Our team closely follows industry shifts, new products, AI breakthroughs, technology trends, and funding announcements. Articles undergo thorough editing to ensure accuracy and clarity, reflecting DevX’s style and supporting entrepreneurs in the tech sphere.

See our full editorial policy.

About Our Journalist