rustHow to declare a matrix in Rust?

A matrix can be declared in Rust using a two-dimensional array. The following example code block shows how to declare a 3x3 matrix:

let matrix: [[i32; 3]; 3] = [
    [1, 2, 3],
    [4, 5, 6],
    [7, 8, 9],
];

The output of the above code is:

[[1, 2, 3], [4, 5, 6], [7, 8, 9]]

The code consists of the following parts:

• let: This is a keyword used to declare a variable.
• matrix: This is the name of the variable.
• [[i32; 3]; 3]: This is the type of the variable. It is a two-dimensional array of type i32 with 3 elements in each row.
• [...]: This is the value of the variable. It is an array of 3 arrays, each containing 3 elements.

Helpful links

• Rust Documentation - Arrays

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