Typedef Keyword

In C programming, the 'typedef' keyword is used to create aliases or alternative names for existing data types.

It allows you to define custom names for data types, making your code more readable and easier to understand.

Here's an example of using the 'typedef' keyword to create a custom type alias:

typedef unsigned long long ULL;

ULL number = 1234567890;
printf("Number: %llu\n", number);

    

In this example, the 'typedef' keyword is used to create an alias named 'ULL' for the 'unsigned long long' data type.

The 'ULL' alias can now be used as a shorthand notation for 'unsigned long long'.

In the code, a variable named 'number' of type 'ULL' is declared and initialized with a value. The value is then printed using 'printf'.

The 'typedef' keyword is often used to improve code readability and create meaningful names for complex or commonly used data types.

It can also help to abstract away implementation details and make the code more portable across different platforms.