Looping through each

Example: given ["one", "two", "three"]


  Output =>
  one pineapple(s)
  two pineapple(s)
  three pineapple(s)

For Loop

Example: given numbers 0 through 10, find
the odd numbers.


  Output =>
  1
  3
  5
  7
  9

While Loops

Example: given it's your birthday, get the even number of pina colada drinks (excluding 0 since no person can resist drinking 0 pina colada drink on their birthday).


  Output =>
  I can drink 2 pina colada drinks.
  I can drink 4 pina colada drinks.
  I can drink 6 pina colada drinks.
  I can drink 8 pina colada drinks.
  I can drink 10 pina colada drinks.

JavaScript

SYNTAX:

var array = ["one", "two", "three"]
for (var i = 0; i < array.length; i++) {
do something;
}

var array = ["one", "two", "three"]
for (var i = 0; i < array.length; i++) {
console.log(array[i] + " pineapple(s)");
}

JavaScript

SYNTAX:

for (var i = 0; i < array.length; i++) {
if (conditional statement) {
do something;
}
}

var array = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
for (var i = 0; i < array.length; i++) {
if (array[i] % 2 != 0) {
console.log(array[i]);
}
}

JavaScript

SYNTAX:

var counter = starting value
while (true statement) {
do something;
counter increment;
}

var number = 2;
while (number <= 10) {
console.log("I can drink " + number + " pina colada drinks.");
number+=2;
}

Ruby

SYNTAX:

array.each {|variable| do something}

array = ["one", "two", "three"]

array.each {|number| puts number + " pineapple(s)"}

Ruby

SYNTAX:

for i in 0..n
do something
end

for i in 0..10 do
puts i if i % 2 != 0
end

Ruby

SYNTAX:

counter = starting value
while(true statement)
counter increment
do something
end

number = 2
while number <= 10
number += 2
puts "I can drink " + number.to_s + " pina colada drinks."
end

Looping Cheat Sheet

Looping through each

For Loop

While Loops