What is declare definition?

The declare statement is used to declare a variable in a program. The declaration allocates memory for the variable, and specifies its data type and initial value. Variables can be declared at the beginning of a code block or function, or globally (outside the scope of any function), depending on where they are needed. The syntax for declaring a variable varies depending on the programming language used. In some languages, the declaration and initialization of a variable can be combined, while in others they are separate statements. It is important to declare variables before using them in a program, as undeclared variables can cause errors and unexpected behavior.