A variable binding gives a named object a place to store a value during program execution. Keep four parts distinct: the object is the storage itself, the type specifies its kind, the value is the stored content, and the identifier is the name used to refer to it. section 2.2
Declarations create named storage
In `int argc;`, `argc` identifies a variable whose type is `int`. Likewise, `double A[5];` declares `A`, and `size_t I;` declares `I`. The declaration supplies the type and name; later statements can use operators such as `=` for initialization or assignment and `++` to increase a variable's value by one. section 2.2 section 2.1
Read a declaration by separating its roles:
- `argc`, `A`, and `I` are identifiers used as names. section 2.2
- `int`, `double`, and `size_t` specify the kind of object involved. section 2.2
- The object and its value are conceptually different: a declaration names storage, while execution can give that storage a value. section 2.2
- Not every identifier is a variable: identifiers can also name functions, type aliases, or constants. section 2.1
int main(int, char*[]); int argc; [[maybe_unused]] char* argv[]; double A[5]; size_t I;
Inspect the declarations together to compare variable names, types, arrays, and pointer syntax. section 2.2
