Number Pattern

Part of the Fundamentals section of Coddy's C# journey — lesson 67 of 69.

When creating patterns like pyramids, we often need to create strings with repeated characters. Here's a useful technique to create such strings:

string str = new string('a', 10);

str will hold "aaaaaaaaaa"

Let's break down how this works:

new string creates a string of characters
the char 'a' indicates what character we want to repeat
10 indicates how many times to repeat the character

Challenge

Easy

Each test case has one input - an odd whole number.
Your task is to print n - pyramid using *, here are some examples:

1 - pyramid

5 - pyramid

*
***
*****

7 - pyramid

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

Input

odd integer n from user
1 <= n < 1000

Tips

Try starting from the small triangles
Check the hint if you are stuck ;)

n represents the number of * in the bottom row

Cheat sheet

To create strings with repeated characters in C#, use the string constructor:

string str = new string('a', 10);

This creates a string containing the character 'a' repeated 10 times, resulting in "aaaaaaaaaa".

The syntax breakdown:

new string - creates a string of characters
'a' - the character to repeat
10 - how many times to repeat the character

Try it yourself

using System;

public class Program {
    public static void Main(string[] args) {
        int n = int.Parse(Console.ReadLine());
    }
}

Test yourself

This lesson includes a short quiz. Start the lesson to answer it and track your progress.

All lessons in Fundamentals

1Introduction

C#Hello World!Comments Basic Program Structure

4Operators Part 1

Arithmetic Operators Modulo Operator Increment/Decrement Post Increment/Decrement Arithmetic Shortcuts

7Basic IO

Basic Output String Interpolation Reading Input Parse Recap - Till 120 Recap - True or False

10Methods (Functions)

Declaring Methods Method Parameters Return Types Optional Parameters Recap - Validation Function Void Methods

13Iterating Over Collections

Using For Loop Foreach Loop Common Array Operations

2Variables Part 1

Numbers Char String Boolean Type Declaration

5Operators Part 2

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

8Calculator App

Welcome Message Getting Numbers

Basic Operations

Formatted Output

11Arrays Basics

Declaring Arrays Accessing Elements Modifying Arrays Array Methods Recap - Product Array Edit Recap - Reversed Array

14Final Challenges

Number PatternPattern Finder Student Grade Calculator

3Variables Part 2

Var Constants Naming Conventions Recap - Initialize Variables Type Casting

6Decision Making

If Statement If - Else Switch Statement Ternary Operator Recap - If Else Nested If - Else

9Loops

For Loop While Loop Do While Loop Break Continue Nested Loop Infinite Loop Recap - Dynamic Input

12String Operations

String Methods Part 1 String Methods Part 2 String Formatting