How to count the Number of Occurrences of Specified Element in the Array in Rust - Step by Step Examples

How to count the Number of Occurrences of Specified Element in the Array in Rust ?

Answer

To count the number of occurrences of a specified element in an array in Rust, you can use iterators or loops to iterate through the array and count each occurrence.

✐ Examples

1 Count Occurrences of Element 30 in Integer Array using iterator

In this example,

We create a vector named numbers with values 10, 20, 30, 40, 30, 50.
We use the iter method to create an iterator over the vector.
We use the filter method on the iterator to filter elements equal to 30.
We use the count method to count the filtered elements.
The count will represent the number of occurrences of element 30.

Rust Program

fn main() {
    let numbers = vec![10, 20, 30, 40, 30, 50];
    let count = numbers.iter().filter(|&x| *x == 30).count();
    println!("Number of occurrences of element 30: {}", count);
}

Output

Number of occurrences of element 30: 2

2 Count Occurrences of Element 'banana' in String Array using loop

In this example,

We create a vector named fruits with values 'apple', 'banana', 'cherry', 'banana'.
We initialize a counter variable count to 0 to store the count of occurrences.
We use a loop to iterate through the vector and increment count each time element 'banana' is found.
After the loop, count will contain the total count of occurrences of element 'banana'.

Rust Program

fn main() {
    let fruits = vec!["apple", "banana", "cherry", "banana"];
    let mut count = 0;
    for fruit in &fruits {
        if fruit == "banana" {
            count += 1;
        }
    }
    println!("Number of occurrences of element 'banana': {}", count);
}

Output

Number of occurrences of element 'banana': 2

Summary

In this tutorial, we learned How to count the Number of Occurrences of Specified Element in the Array in Rust language with well detailed examples.

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How to count the Number of Occurrences of Specified Element in the Array in Rust - Step by Step Examples

How to count the Number of Occurrences of Specified Element in the Array in Rust ?

Answer

✐ Examples

1 Count Occurrences of Element 30 in Integer Array using iterator

Rust Program

Output

2 Count Occurrences of Element 'banana' in String Array using loop

Rust Program

Output

Summary

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