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Solution: Calculate the Number of Uppercase and Lowercase Letters

Explore how to write a Python function that counts uppercase and lowercase letters in a string. Understand how to use dictionaries, loops, and conditional checks to solve this common string manipulation problem efficiently.

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The solution to the problem of calculating the number of uppercase and lowercase letters in Python is given below.

Solution

Python 3.8
def count_lower_upper(s) :
  dlu = {'Lower' : 0, 'Upper' : 0}
  for ch in s :
    if ch.islower( ) :
      dlu['Lower'] += 1
    elif ch.isupper( ) :
      dlu['Upper'] += 1
  return(dlu)
d = count_lower_upper('James BOnd ')
print(d)

Explanation

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