Jul 8, 2025 · The const declaration creates an immutable reference to a value. It does not mean the value it holds is immutable — just that the variable identifier cannot be reassigned.

When to use JavaScript const? Always declare a variable with const when you know that the value should not be changed. Use const when you declare: A new Array A new Object A new Function A …

In C, C++, and D, all data types, including those defined by the user, can be declared const, and const-correctness dictates that all variables or objects should be declared as such unless they need to be …

Mar 13, 2023 · In C++, you can use the const keyword instead of the #define preprocessor directive to define constant values. Values defined with const are subject to type checking, and can be used in …

Jul 11, 2025 · int const* is pointer to constant integer This means that the variable being declared is a pointer, pointing to a constant integer. Effectively, this implies that the pointer is pointing to a value …

Aug 14, 2024 · This page was last modified on 14 August 2024, at 03:27.

1 day ago · Learn C++ constants with this complete guide. Understand const variables, constexpr functions, compile-time evaluation, const correctness, const pointers, and when to use each for …

Read this tutorial and learn useful information about declaring a constant by using the const keyword which creates a read-only reference to the value.

This tutorial shows you how to use the JavaScript const keyword to declare constants whose values are immutable.

May 9, 2025 · When a variable is declared as const, it becomes read-only and cannot be reassigned later in the code. In C++, a constant variable is a value that cannot be changed once it’s been …