{ "content": "

Understanding variables<\/a><\/h1>

In the field of computer-science<\/a>, a variable<\/a> is a symbolic name associated with a value that can change during the execution of a program<\/a>. According to Wikipedia<\/a>, variables<\/a> represent memory-address<\/a> locations where data<\/a> is stored. These identifiers allow software-engineers<\/a> to manipulate information using human-readable names rather than hexadecimal addresses.<\/p>

Different programming-languages<\/a> implement variables<\/a> in various ways. For instance, statically-typed<\/a> languages like java<\/a> and c++<\/a> require a variable<\/a> to be declared with a specific data-type<\/a>. In contrast, dynamically-typed<\/a> languages such as python<\/a> and javascript<\/a> allow the data-type<\/a> to be determined at runtime<\/a>, as detailed in the MDN Web Docs<\/a>. The scope<\/a> of a variable<\/a> defines where it can be accessed within the source-code<\/a>, often categorized into global-scope<\/a> and local-scope<\/a>.<\/p>