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Number Pyramid

Part of the Fundamentals section of Coddy's JavaScript journey — lesson 75 of 77.

Arithmetic operations can also be done on strings. For example:

let str1 = "aaa" + "b";

str1 will hold "aaab"

This is the same as:

let str1 = "aaa";
str1 += "b";

Also, we can even use multiplications with repeat():

let str1 = "a".repeat(10);

str1 will hold "aaaaaaaaaa"

Challenge

Easy

Each test case has one input - an odd whole number. (given)
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

String concatenation using the + operator:

let str1 = "aaa" + "b"; // "aaab"

String concatenation using the += operator:

let str1 = "aaa";
str1 += "b"; // "aaab"

String repetition using repeat():

let str1 = "a".repeat(10); // "aaaaaaaaaa"

Try it yourself

let n = parseInt(inp); // Don't change this line

Test yourself

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

All lessons in Fundamentals

1Introduction

The Language Hello World!Comments Code Structure

4Operators Part 2

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

7Bill Split Calculator

Welcome Message Calculating The Tip And Total

Project lesson

Splitting The Bill

Project lesson

Formatted Output

Project lesson

10FizzBuzz with a Twist

Game Overview The FizzBuzz Function

Project lesson

Looping The Numbers

Project lesson

Adding The Twist

Project lesson

13Grocery List Tracker

Project Overview Add Item

Project lesson

Project lesson

Project lesson

2Variables

Numbers String Boolean Naming Conventions Empty Variables Recap - Initialize Variables Constants

5Decision Making

If Statement If - Else Recap - Simple Calculator Nested If - Else Switch Statement

8Loops

For Loop While Loop Break Continue Recap - Factorial Do While Loop Nested Loop

11Arrays Part 1

Declaring an Array Accessing Array Elements Modifying Arrays Array Methods Part 1 Array Methods Part 2 Recap - Array Processor

14Final Challenges

Number PyramidDouble The Odds What To Buy