Which data type is used to store one single character?

The data type used to store a single character is the "Char" type. This type is specifically designed to hold one character, which can include letters, numbers, symbols, or any other single printable character. In many programming languages, such as C, Java, and Python, a Char is often represented by a single quote (e.g., 'a'), indicating that it contains just one character.

In contrast, the String data type is meant for storing a sequence of characters, which can include multiple letters or symbols. An Integer data type stores whole numbers and does not accommodate characters at all. Lastly, the Boolean data type is used to store truth values—specifically, either true or false. Therefore, when storing a single character, the Char data type is the most suitable and efficient choice.