any one please give me answer to construct a program for counting special characters in a string

Answer 1

what do you mean by 'special characters'? is it some characters specified by you or it is every character that is not a digit or letter?

anyway, look at regular expressions, you can do anything like this using them

Answer 2

# a generalizable solution

str_to_check="abcdef\n\tghijk"
spec_chars=set()

# add whatever you consider 'special'
for c in range(32):
spec_chars.add(chr(c))

# can use extract to see what it found
extract =(i for i in list(str_to_check) if i in spec_chars)

print(len(list(extract)))

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(prints '2' in this case)

Answer 3

aString = '123abcamp;!?'
letterNumcount = 0
charCount = 0

for i in aString:
if i.isalnum(): #checks for letters and numbers
letterNumcount += 1
elif not (i.isalnum() or i.isspace()):
#checks character is not a letter, number, or #space
charCount += 1

print('letter and number count: ', letterNumcount)
print('character count: ', charCount)