chiragmongia

#Inverse Case
#Overwrite the default 'to_s' method such that it inverses the case of each letter.
#Eg: "hello WORLD".to_s -> "HELLO world"

class String
  def to_s 
    self.swapcase
  end
end

chiragmongia

#Question- Fibonacci - Yield
#Fibonacci Series upto 1000 using 'yield'.

def fibonacci_series(number)
  @first_number = 0
  @second_number = 1
 
  while @first_number <= number
    yield(@first_number, @second_number)
  end

chiragmongia

class String
  def to_s
    puts "---Swapping the case of string---"
    p  self.swapcase
  end
end

p "Enter the string"
line = gets.chomp
line.to_s

chiragmongia

def fact(n)
  if n == 0
    1
  else
    n * fact(n-1)
  end
end

def pascal_row(n)
  for k in 0..n

chiragmongia

def prime(n)
  prime_no = []
  a =0
    if n==2
      print "#{n} is prime no"
    end
  prime_no << 2
  3.step(n,1) do |num|
  2.step(num/2,1) do |k|
      if num % k == 0

chiragmongia

class Array
  def power(x)
    @x = x
    @f= []
    self.each do |i| 
    b = i
    c = 1
    @x.times{ c = c * b }
    @f << c
    end

chiragmongia

p "Enter the string"
line = gets.chomp
p "Enter pattern to be searched"
pattern = gets.chomp

p matchfound = line.gsub(/#{pattern}/,"(#{pattern})")
print "Number of occurences- "
p line.scan(/#{pattern}/).size

chiragmongia

p "Enter the string"
line = gets.chomp
arr = line.split(//)

lower = 0
upper = 0
num   = 0
other = -1
for i in 0..arr.size
  case arr[i]

chiragmongia

def reverse(string)
  arr = string.split
  arr.reverse!
  p arr.join(" ")
end

p "Enter the string"
string = gets.chomp
reverse(string)

chiragmongia

def factorial(num)
  p (1..num).inject(:*) || 1
end

p "Factorial Using Ranges"
print "Enter the number: "
num = gets.to_i
print "Factorial is: "
factorial(num)