Examples: i, alpha, tmp.
Formal definition:
variable_name --> identifier
identifier --> firstchar [morechars]
morechars --> nextchar [morechars]
firstchar --> A..Z a..z _
nextchar --> A..Z a..z 0..9 _
variable which is used to specify the values and also we can that values through the variable name
I can tell you that it is not an illegal variable name in C. I do not currently have a C++ compiler installed, but I would assume that it would also be valid in C++.
with the help of pointers we able to store the memory location of any variable. In c the pointer variable is use to store the memory location of any variable. The pointer variable is define as a simple variable but in pointer variable use a special "*" character at the left most side of name of pointer variable. If any variable name have * it means it is a pointer variable it hold the memory location of variable.
A variable is the name for a place in the computer's memory where you store some data.
count is a function that counts the variable name.
name = value example: x=1
a variable having the datattype and name, an identifier is the name of the variable for example int x; here int x; is the variable x is the identifier
The type is struct. The name can be any valid variable name that is not a keyword or other reserved name.
During declaration, the declaration goes like this: extern <type> <variable-name> or <type> <function-name> (<parameter list>);
It's a part of the program's data, which has a name,type and value.
causation
A macro is a variable that has a constant value throughout the program whereas a C variable is an identifier whose value can differ from function to function, it can be incremented or decremented whereas the value of a macro remains same .