loops.rb

# Loops
# In ruby, we have several ways to create loops. Here are some of the most common ones:

# 1. `while` loop
# while loops is used to execute a block of code as long as a specified condition is true.

i = 0
while i < 5
  puts i
  i += 1
end

# 2. `until` loop
# until loops is used to execute a block of code as long as a specified condition is false.

i = 0
until i >= 5
  puts i
  i += 1
end

# 3. `for` loop
# for loops is used to iterate that we know how much times we want to execute a block of code.
# we can use data collection like array or range to iterate over.

# use range
for i in 0..4
  puts i
end

# use array
fruits = ["apple", "banana", "cherry"]
for fruit in fruits
  puts fruit
end

# 4. `each` loop
# each loops is used to iterate over a collection of items, such as an array or a hash.

# use array
[0, 1, 2, 3, 4].each do |i|
  puts i
end

# use hash
person = { name: "John", age: 30, city: "New York" }
person.each_pair { |key, value| puts "#{key}: #{value}" }

# 5. `times` loop
# times loops is used to execute a block of code a specified number of times.

5.times do |i|
  puts i
end

# For more methods and details, you can refer to the official Ruby documentation.