Count input length without spaces, periods, or commas

Question

How do you count the length of a string (example "Hello, Mr. John. Have a good day." taking out the commas, periods and white spaces?

string = "Hello, Mr. John. Have a good day."
print(len(string))

The count should be 23. I'm coming up with 33 with the commas, periods and white spaces.

Answer 1

I would recommend a regular expression here. That way you don't need to do multiple str.replace.

In [8]: import re                                                               

In [9]: string = "Hello, Mr. John. Have a good day."                                     

In [10]: new_str = re.sub('[ .,]', '', string)                                  

In [11]: len(new_str)                                                           
Out[11]: 23

Here the replacement group is [ .,]. Anything within the brackets will be replaced, which in this case is a space, period or comma.

Answer 2

Whitespace can be more than just space characters so use \s:

import re
string = "Hello, Mr. John. Have a good day."
print(len(re.sub(r'[,.\s]+', '', string)))

23

Answer 3

user_text = input()
numOfChars = 0 #number of charachters
count = 0 #to count index of user_text
for i in user_text:
    if user_text[count] != ' ' and user_text[count] != '.' and user_text[count] != ',':
        numOfChars += 1
    count += 1
print(numOfChars)

Answer 4

user_text = input()

comma_count = 0
period_count = 0
space_count = 0
for char in user_text:
    initial_len = len(user_text)
    if char == ',':
        comma_count += 1
    elif char == '.':
        period_count += 1
    elif char == ' ':
        space_count += 1
not_allowed = (comma_count + period_count + space_count)
print(initial_len - not_allowed)

My newbie solution for this problem sets up a for loop to assess each character of input and total string length. Each character is compared to unwanted character types, counting them individually.

Answer 5

print(len(string.replace(",", "").replace(".", "").replace(" ","")))

Answer 6

#include <iostream>
#include <string>
using namespace std;

int main() {
   string userText;
   int i = 0;
   string str1;
   string str2="";
   
   getline(cin, userText);  // Gets entire line, including spaces. 

   while(i<userText.size()){
      if(userText.at(i) != ' ' && userText.at(i) !=',' && userText.at(i) !='.'){
         str1 = userText.at(i);
         str2 = str2 + str1;
      }
   ++i;
   }
   cout << str2.size()<<endl;
      

   return 0;
}

Answer 7

user_text = input()
count = 0 
for char in user_text:
if not(char in " .,"):
    count += 1 
print(count)

Answer 8

Similar to @Tresa, but see proper edits/indents below, accompanied by further explanation:

user_text = input()
output = 0  #set variable

for char in user_text:  #similar to ZyBooks lesson 4.9
    if not(char in " .,"):  #not similar to the lesson
        output += 1 
print(output)

We are going to forego the if statements and do an if not statement, which will clean up your code and make it use as few lines as possible -- thus making it more efficient.

You may be able to do something similar to @Booboo, but DO NOT follow the top program by @Amin MG / @ eyllanesc. The program only accounts for letters and numbers, and not other special characters -- the instructions are only to remove the commas, periods, and white spaces. That means, if a test has "Howdy!", the program will not properly account for the '!', thus yielding a failed test.