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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.
RELATED TAGS
rust
array
length
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CONTRIBUTOR
okwudili onyejiaku
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