Any constant value written in a program is called a(n) ______ value.
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A(n) ______ is a statement that stores the value of an expression into a variable.
A(n) ______ is a statement that associates an identifier with a data object, a function, or a data type so that the programmer can refer to that item by name.
A(n) ______ is a location in memory, referenced by an identifier, where a data value that cannot be changed is stored.
______ is the formal rules governing how valid instructions are written in a programming language.