input: Write a function to identify the largest number in the given list.
  assert identify_largest([1000, 506, 299, 620, 35])==1000
  assert identify_largest([5, 8, 3, 9, 1])==9
  assert identify_largest([1, 2, 3, 4, 5])==5
  assert identify_largest([100, 100, 100, 100])==100
  assert identify_largest([-1, -2, -3, -4, -5])==-1
output: def identify_largest(numbers):
      return max(numbers)