Question

How to convert part of a string between two indexes to lowercase in Python

Answer 1

def convert_part_to_lowercase(s, from_idx, to_idx) : 
    length = len(s) 
    if (from_idx < 0 or to_idx > length) : return s
    s = list(s)
  
    for i in range(length) : 
        if ((i >= from_idx and i <= to_idx) and (ord(s[i]) >= 65 and ord(s[i]) <= 90)):
            s[i] = chr(ord(s[i]) + 32)
     
    return "".join(s)

   
   
s = "PYTHON PROGRAMMING"
       
s = convert_part_to_lowercase(s, 3, 7);
print(s)

s = convert_part_to_lowercase(s, 11, 12);
print(s)       

 
 
'''
run:
 
PYThon pROGRAMMING
PYThon pROGraMMING
 
'''

 

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