JavaScript Exercise Set 3

Simple Problems

  1. Create a program that adds all the numbers from 1 up to the user inputted numeric value.

  2. Create a program that asks for 10 numbers; average of the inputted numbers.

    1. Bonus: let the user decide when to stop inputting the numbers.

  3. Create a program that makes the user continuously guess a WORD (string) until they get the secret word set by you the programmer correct.

  4. “FizzBuzz.” From 1 to 50, if the number is a multiple of three: print “Fizz”, if the number is a multiple of five: print “Buzz”, if they are multiples of both: print “FizzBuzz”.

Challenging Problems

Vowel Counter

Assume that our vowels in our alphabet are only from this set: a e i o u.

Given a string input from the user, determine and output the number vowels within it.

// Sample Input
Hello, World!

// Sample Output
3

There are two vowels in Hello and one vowel in World!.

Tournament Selection (CCC 2016 J1)

Each player in a tournament plays six games. There are no ties. The tournament director places the players in groups based on the results of games as follows:

  • if a player wins 5 or 6 games, output 1 as they are placed in Group 1;

  • if a player wins 3 or 4 games, output 2 as they are placed in Group 2;

  • if a player wins 1 or 2 games, output 3 as they are placed in Group 3;

  • if a player does not win any games, they are eliminated from the tournament; output-1

Write a program to determine which group a player is placed in when given 6 inputs of either W for a win and L for a loss.

// Sample Input
W
L
W
W
L
W
// Sample Output
2

Up and Down

Write a program that will count up from 1 to the user's inputted number, and count down back towards 1.

// Sample Input
5
// Sample Output
1
2
3
4
5
4
3
2
1

Rock Paper Scissors

Create a two player game of Rock Paper Scissors. There will be two inputs: player 1's choice and player 2's choice.

The game should end after a single player has won 5 times. Output who won.

Prime Number Checker

Create a program that determines if the user inputted number of 2 or greater is a prime number.

Palindrome Checker

A palindrome is a word that is the same spelt forwards and backwards.

Some examples of Palindromes:

  • civic

  • madam

  • level

  • mom

  • racecar

  • tacocat

Create a program that determines if the inputted word is a palindrome.

Twenty Questions

Create a program that plays a “20 Questions” game to guess a positive integer between 1 and 100 that the user has in mind.

  • The user will be instructed by the program to think of a single positive integer from 1 to 100 inclusively

  • The program will win if it can guess the number that the user is thinking of in 20 questions or less

  • The user will win if the program fails to guess the number

  • The user does not need to input their number that they are thinking

The program will ask the user a series of yes/no questions to narrow down the possible numbers and will attempt to guess the number within 20 questions.

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