Python Exercise: Add two strings as they are numbers (Positive integer values)

Python String: Exercise-101 with Solution

Write a Python program to add two strings as they are numbers (Positive integer values). Return a message if the numbers are string.

Sample Solution-1:

Python Code:

def test(n1, n2):
    n1, n2 = '0' + n1, '0' + n2
    if (n1.isnumeric() and n2.isnumeric()):
        return str(int(n1) + int(n2))
    else:
        return 'Error in input!'
print(test("10", "32"))
print(test("10", "22.6"))
print(test("100", "-200")) 

Sample Output:

42
Error in input!
Error in input!

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Sample Solution-2:

Python Code:

def test(n1, n2):
  if n1 == '':
    n1= '0'
  if n2 == '':
    n2 = '0'
  if n1.isdigit() and n2.isdigit():
    return str(int(n1)+int(n2))
  return 'Error in input!'
print(test("23", "43"))
print(test("12", "11.6"))
print(test("200", "-100"))

Sample Output:

66
Error in input!
Error in input!

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Python Code Editor:

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