TIK TOK CHINA exercise.

Create a JS program that gets a number from the user and then print the numbers from 0 to the number provided by the user and do the following calcuations.

1- if the number is divisible by 3 it should print TIK instead of the number.

2- If the number is divisible by 5 it should print TOK instead of the number.

3- If the number is divisible by 3 and 5 it should print CHINA instead of the number.

4- Use prompt to get the value from the user.

5- Use console.log to print the output to the console.

Examples of when user inputs 20

1
2
TIK
4
TOK
TIK
7
8
TIK
TOK
11
TIK
13
14
CHINA
16
17
TIK
19
TOK

2 cristmas tree

Write a program that receives a value from a user using prompt and draw a christmas tree using * and spaces with the same level of lines as the number inserted by the user.

Example when user inputs 5

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

3 Enigma machine

Create a program that can encrypt messages using the following rules

1-The program should ask if it needs to encrypt or decrypt

2- the program will receive a phrase in english in lower case

3. the program should replace the letters as follows table, (depending if is encrypting or decrypting.

4 any other character should remain unchanged.

q — a	w — b	e — c	r — d	t — e	y — f
u — g	i — h	o — i	p — j	a — k	s — l
d — m	f — n	g — o	h — p	j — q	k — r
l — s	z — t	x — u	c — v	v — w	b — x
n — y	m — z

example, if the program receives the string “cat” it should return “vke“. when encrypting

In the same way, if the program gets the string ‘vke’, it should return ‘cat’ if decrypting

NOTES:

if you have a variable string

var str = “hello”

you can get characters at specific part of the string with

str.charAt(2)

you can get the length of the string with

str.length

4 Roman Nightmare

Make a program that translates a number provided by the user between 1 and 399 and translates it to roman numbers.

Example when inserting 7 output should be VII

Example when inserting 399 output should be CCCXCIX

Example when inserting 159 output should be CLIX

Notes:, in roman numbers the following equivalences hold true

I = 1

V = 5

X = 10

L = 50

C = 100

III = 3

XXX = 30

III = 300

Variables are used to store values in js.

Examples

var a = 1;
//the previous variable holds a number.
var b = "hello, how are you"
//the previous variable holds a string.