# Extracts the first n digits from a large integer.
# Ruby's Integer type automatically expands to handle very large values,
# so converting the number to a string is the most direct and efficient way
# to access its digits.
def first_n_digits(value, n)
# Convert the integer to its decimal string representation.
s = value.to_s
# If n exceeds the number of digits, return the whole number.
return s if n >= s.length
# Return the first n characters (digits).
s[0, n]
end
def main
# Define a very large integer directly.
# Ruby handles large integers seamlessly.
big_number = 1234567890123456789012345678901234567890
# Choose how many digits to extract.
n = 16
# Extract the first n digits.
result = first_n_digits(big_number, n)
# Display the result.
puts "First #{n} digits: #{result}"
end
main
=begin
run:
First 16 digits: 1234567890123456
=end
