How is data saved in the C programming language?

In C language, data can be saved using the following methods:

1. Variables: Different types of variables can be used to store different types of data. For example, you can use variables of type int to store integers, variables of type float to store floating-point numbers, variables of type char to store characters, and so on.
2. Array: An array is a data structure that can hold multiple elements of the same type. Arrays can be used to store a collection of related data, such as using an int array to store a group of integers or a char array to store a group of characters.
3. Struct: A struct is a type of data structure that can hold multiple elements of different types. It can be used to store a group of related data with different properties.
4. Files: You can save data to a file so that it can be re-read and used after the program has finished running. File operations such as fopen, fread, fwrite, and fclose provided by the C standard library can be used for file reading and writing.

It should be noted that when using the methods mentioned above to store data, it is important to choose the appropriate data structure and operation method based on the type and requirements of the data.