Constants in Rust are different from immutable variables in several ways:
Constants are always immutable and cannot be changed at runtime, whereas immutable variables can be reassigned at runtime.
Constants are always evaluated at compile-time, whereas immutable variables are evaluated at runtime.
Constants can be used in a wider range of contexts, including as array sizes, function arguments, and as part of pattern matching. Immutable variables cannot be used in these contexts.
Constants have a stricter type-checking compared to immutable variables. For example, constants of different types cannot be added together, whereas immutable variables of different types can.
Therefore, constants provide a more robust and efficient way of defining values that are known and fixed at compile-time, while immutable variables are more flexible and can be modified at runtime.
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Asked: 2023-06-02 06:31:10 +0000
Seen: 14 times
Last updated: Jun 02 '23
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