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Finding the length of an array in Rust

okwudili onyejiaku

Overview

The length of an array is the number of elements present in the array. We use the len() function to obtain this value.

Syntax

array.len()
Syntax to obtain the length of an array in Rust

Parameters

This method has no defined parameters.

Return value

The value returned is an integer representing the total count of elements present in the given array.

Example

// main function
fn main(){
   // create some arrays
   let numbers = [5,10,15];
   let animals = ["cat","dog","fox","koala"];
   let letters = ["A","B","C","D","E"];
   let ages:[i32;5] = [10,22,30,4,18];

   // print length of arrays
   println!("Length of numbers array: {}", numbers.len());
   println!("Length of animals array: {}", animals.len());
   println!("Length of letters array: {}", letters.len());
   println!("Length of ages array: {}", ages.len());
}
Code to obtain the length of an array in Rust

Explanation

  • Line 4–7: We create some arrays.
  • Line 10–13: Obtain the lengths of the arrays and print them on the console.
Note: ages:[i32;5] on line 7 means that the array is of 32-bit integer type and has a length of 5.

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rust
array
length
communitycreator
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