Question

How to count the unique characters in a string with Python

Answer 1

string = 'python javascript typescript node.js c c++'

arr = []

for char in string[::]:
    if char not in arr:
        arr.append(char)
        
print(len(arr))




'''
run:

18

'''

 

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Answer 2

string = 'python javascript typescript node.js c c++'

print(len(set(string)) )




'''
run:

18

'''

 

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