different symbols and functions

Question 1

Define % and what it’s used for

Answer 1

% is a module used to find how many times a number can go into another. fro example 4 % 2 = 0 and 5 % 2 = 1.

Question 2

Define ! and how it’s used

Answer 2

The symbol ! is = to “not”
For example num != 0 or num is not equal to 0.
or
if (num % 3) == 0 && !(num % 5 == 0)

Question 3

Define ==

Answer 3

== is when you want to know if 2 variables are the same.
for example if num = 32
num == 32 then this is true
but
if
num == 22 then this is false

Question 4

Define <=

Answer 4

less than or equal to

Question 5

Define >=

Answer 5

Greater or equal to

Question 6

Define >

Answer 6

Greater then

Question 7

Define <

Answer 7

Less then

Question 8

Define [] and what its used for

Answer 8

It gets the index in an array
For example

num[“hello”, “no”, “yes”]
num[2] would equal to “yes”

Question 9

Define .length

Answer 9

.length is used to get the length of a string or and array

Question 10

Define .chr

Answer 10

.chr is equal to a character of a string

Question 11

Define i

Answer 11

i is used to define a number
i = 0

Question 12

what are the Booleans in Ruby

Answer 12

in Ruby there are 2 Boolean values, true and false

Question 13

How does an ‘if’ statement work?

Answer 13

if statement executes code if the Boolean is equal to ‘true’

Question 14

Define def and return

Answer 14

def defines a method and return exits a method

Question 15

Define elsif statement and what it does

Answer 15

elsif is a conditional statement that pairs with a previous if statement, it takes on a Boolean expression if the previous was false, for it to run the Boolean expression now has to be true.

Question 16

Define ‘while’ and waht it does

Answer 16

while is a loop that you use to give an order as long as its true, if false it executes code after the end loop

Question 17

Define .push() and how it works

Answer 17

.push() can add multiple data into an array while &laquo_space;can only add 1 per time

Question 18

Define .pop() and how it works

Answer 18

.pop() takes away the last data in the array and is also now equal to it

Question 19

Define .unshift() and how it works

Answer 19

.unshift() adds data to the front of the array, it must include a parameter

Question 20

Define .shift() and how it works

Answer 20

.shift() takes away first data of an array

Question 21

Define .index() and how it works

Answer 21

.index gets the index of an array for Ex: array.index(“Hello”)
array = [“hello”, “no”] puts array.index(“llo”) would give us 2

Question 22

Define .include?() and how it works

Answer 22

.include?() is going to give you a boolean checking if the variable exist in an array of data

Question 23

Define array.pop()

Answer 23

array.pop() takes away the last data entry of an array

Question 24

Define array.push()

Answer 24

array.push() gets a parameter and includes it in the back of an array. you must include a parameter

Question 25

define array.reverse()

Answer 25

it gives you the reverse data but it does not save it.

Question 26

define array.reverse!()

Answer 26

if you want to change the array and keep it that way, you can use this method to reverse and save the data.

Question 27

How to use a range and what symbols to use

Answer 27

a range of an array helps you get the data of an array between a certain index, if used like this [0..3] it will get the dat from 0-3 but if yuo use 3 dots, [0...3] it gets all the data from 0 to not including 3.

Question 28

define .split() and how it works

Answer 28

str.split() is used when you want to take variables away in a string. by doing this you can now turn that string into an array.

Question 29

define array.join()

Answer 29

by doing this method you can turn an array into a string.

Question 30

explain .each , .each_char and .each_with_index && .each_char.with_index

Question 31

explain .times