How to print Hour Glass Pattern in Rust - Step by Step Examples

How to print Hour Glass Pattern in Rust ?

Answer

To print an Hourglass Pattern in Rust, we use nested loops. The outer loop controls the rows, and the inner loops control the spaces and stars (*) to form the pattern.

✐ Examples

1 Hourglass Pattern

In this example,

We define a function print_hourglass that takes the desired number of rows n as a parameter.
We use two nested for loops, where the outer loop runs from n to 1 and the inner loops control the spaces and stars in each row.
Within the inner loops, we calculate the number of spaces and stars based on the current row number to form the hourglass pattern.

Rust Program

fn print_hourglass(n: usize) {
    for i in (1..=n).rev() {
        println!("{}{}", " ".repeat(n - i), "*".repeat(2 * i - 1));
    }
    for i in 2..=n {
        println!("{}{}", " ".repeat(n - i), "*".repeat(2 * i - 1));
    }
}

fn main() {
    print_hourglass(5);
}

Output

*********
 *******
  *****
   ***
    *
   ***
  *****
 *******
*********

Summary

In this tutorial, we learned How to print Hour Glass Pattern in Rust language with well detailed examples.

◀ Previous Next ▶

Rust Tutorials

Rust How-Tos