Generate Random Numbers in Ruby

require 'securerandom'

# Generate a single random number between 1 and 100
random_number = rand(1..100)
puts random_number  # Example output: 42

# Generate multiple random numbers
numbers = Array.new(10) { rand(1..100) }
puts numbers.inspect
# Example output: [23, 7, 91, 45, 12, 68, 3, 89, 54, 31]

# Generate cryptographically secure random number
secure_number = SecureRandom.random_number(1..100)
puts secure_number  # Example: 67

# Random float between 0 and 100
random_float = rand(0.0..100.0)
puts format('%.2f', random_float)  # Example: 42.17

# Using Random class for reproducible results
prng = Random.new(42)  # Seeded for reproducibility
seeded_number = prng.rand(1..100)
puts seeded_number