10 Questions
What is a variable in C?
A substitute for the value it stores in C
What happens during the variable initialization process in C?
Assignment of a meaningful value by the user
Which aspect of defining a variable in C involves allocating memory and assigning a random garbage value?
Variable definition
What does a variable's size in C depend on?
The data type it stores
Which type of variable in C has a scope limited to the block or function in which it is declared?
Static variable
What keyword is used to define a static variable in C?
static
Which type of variable in C can retain its value for multiple function calls?
Static variable
What is the default value of static variables in C?
Zero
Which type of variable in C can be shared between multiple C files?
Global variable
Register variables in C are stored in the CPU register instead of what usual storage location?
RAM
Study Notes
Variables in C
- A variable in C is a named storage location that holds a value.
Initialization Process
- During variable initialization, memory is allocated and a value is assigned to the variable.
Defining a Variable
- Defining a variable in C involves allocating memory and assigning a random garbage value.
Variable Size
- A variable's size in C depends on its data type.
Scope of Variables
- Automatic variables have a scope limited to the block or function in which they are declared.
Static Variables
- The keyword
staticis used to define a static variable in C. - Static variables can retain their value for multiple function calls.
- The default value of static variables in C is zero.
External Variables
- External variables in C can be shared between multiple C files.
Register Variables
- Register variables in C are stored in the CPU register instead of RAM.
Learn about variables in the C programming language, which are names associated with memory locations to store data of different types. Understand the different types of variables in C based on scope, storage class, lifetime, and the type of data they store.
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