Computer reviewer

• A byte is a series of 1s and 0s usually grouped in a sequence
• Pointers are variables used to store memory locations
• Asterisk before the variable indicates that an identifier will be a pointer variable
• Asterisk before the variable is used to tell the compiler to reserve a memory space that can hold a memory address
• Null is typically done to wipe any garbage values that have no use at all
• Ampersand symbol refers to the address of the variable
• Functions are genetally used to make programs modular
• A function must be declared prior to its use except when it is already defined.
• the parameter list of a funtion may have parameters of any data type
• Parameters are optional
• The number and data types of parameters should match the number of data types
• The return statement is used to return a single value from a function.
• The return statement is optional
• If a function does not return a value its return type will be void
• If the data type of the value returned of a function is not declaere it is converted into int.
• Functions makes programs significantly eaisier to understand and maintain
• Well writren function can be reused on other programs
• Global variables are declared outside any function
• Local variables can only be used within the same function
• Parameters only accept values from other functions of the programmm.
• Indirection operator [*] returns the value of the address stored by the pointer
• The address-of operator [&]returns the address of the pointer