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Recap - Pretty Print Array

Part of the Fundamentals section of Coddy's Rust journey — lesson 59 of 75.

Challenge

Easy

Create a program that receives an array of size 5, and prints the array beautifully in the following format:

[elem1, elem2, elem3, ...]

Each element is separated by , (comma followed by a space). There is no trailing comma or extra space before the closing bracket ].

For example, given the input 1,2,3,4,5, the output should be:

[1, 2, 3, 4, 5]

To iterate over elements in the array use:

for i in 0..arr.len() {
	arr[i];
	...
}

Try it yourself

use std::io;
use std::convert::TryInto;

fn main() {
    let mut input_str_arr = String::new();
    io::stdin().read_line(&mut input_str_arr).unwrap();
    let arr: [String; 5] = input_str_arr.split(',').map(String::from).collect::<Vec<String>>().try_into().unwrap();

    print!("[");
    // Write your code below

    
    println!("]");
}

All lessons in Fundamentals

1Introduction

Rust Hello World!Comments Basic Program Structure

4Operators Part 1

Arithmetic Operators Modulo Operator Arithmetic Shortcuts Comparison Operators String Comparison

7Basic IO

Printing to Console Reading User Input Recap - Till 120 Recap - True or False

10Variable Bindings

Scope Shadowing Part 1 Variable Binding Shadowing Part 2

13Arrays Continued

Mutable Reference Arrays Array Methods Recap - Product Array Recap - Reversed Array Better Print

16Final Projects

Number Pattern Pattern Finder Student Grade Calculator

2Variables Part 1

Numbers Char String Boolean Mutable Variables

5Operators Part 2

Logical Operators Part 1 Logical Operators Part 2 Recap - Simple Logic Logical Operators Part 3

8Calculator App

Welcome Message Getting Numbers

Project lesson

Basic Operations

Project lesson

Formatted Output

Project lesson

11Functions

Declaring Functions Parameters and Arguments Return Values Multiple Return Values Recap - Sigma Function Recap - Validation Function

14Iterating Over Arrays

Range Guide Enhanced For Loop Borrow In Loop Common Array Operations

3Variables Part 2

Type Declaration Naming Conventions Type Inference Recap - Initialize Variables Type Casting

6Decision Making

If Expressions If-Else Match Statement Recap - If Else Nested If - Else

9Loops

For Over Series While Loop Break Continue Nested Loop Loop Labels Infinite Loop Recap - Dynamic Input

12Arrays Basics

Declaring Arrays Array as Parameter Accessing Elements Modifying ArraysRecap - Pretty Print Array

15String Operations

String Methods format! Macro String Conversion Recap - Format