Rust TutorialLesson 7Free preview

Rust Variables

This lesson is part of Rust · All levels

Summary

This lesson discusses the declaration of variables and the concept of mutability in Rust. By default, all variables in Rust are immutable (unchangeable) to prevent an unintended state change. If the value is to be changed, the programmer must explicitly add the keyword 'mut'.

Key points

Variable declared with the keyword 'let'
By default the variable in Rust is immutable
The keyword 'mut' must be added if the variable needs to be changed in value
The shadowing concept allows the re-declaration of the variable with the same name

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