What is declare?

In programming, "declare" is a keyword that refers to the act of defining a variable or constant with a given data type and name in a program.

Declaring a variable enables the program to reserve space in memory to store data values to be referenced and updated throughout the code. This helps programmers to organize and efficiently use computer memory.

In some programming languages, such as Python, declaration of variables is not required as the data type can be inferred from the value assigned to it. However, in languages such as C and Java, declarations are required.

Declaration of variables is an essential part of programming because it helps in detecting errors and bugs in the program early on, thus saving the programmer time and effort in debugging it later.