Basics
Nim Constants
Using Constants
Nim constants use const for compile-time immutable values.
What are Constants in Nim?
In Nim, constants are immutable values defined at compile-time. They are useful for values that do not change throughout the execution of a program. Constants are declared using the const keyword.
Declaring Constants
To declare a constant in Nim, use the const keyword followed by the name of the constant and its value. The value assigned to a constant must be known at compile-time.
Constant Expressions
Nim constants can also be the result of constant expressions, which are evaluated at compile-time. This allows for more complex constant definitions.
Limitations of Constants
Constants in Nim cannot be altered once they are defined. Attempting to change the value of a constant after its declaration will result in a compile-time error. Additionally, constants are limited to values and expressions that are determinable at compile-time.
Practical Uses of Constants
Constants are ideal for representing fixed values, such as configuration parameters, mathematical constants, or any value that should remain unchanged. Using constants can improve code readability and maintainability by removing magic numbers and strings from your code.
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