Write a python program to compute sum of digit of a given string

Generator expressions are used to perform some operation for every element, or select a subset of elements that meet a condition.

On each iteration, we check if the character is a digit.

The method returns True if all characters in the string are digits and there is at least 1 character, otherwise False is returned.

We convert all digits to integers and use the sum() function to get the total.

The last step is to use the sum() function to sum the numbers in the generator object.

The function takes an iterable, sums its items from left to right and returns the total.

The sum function takes the following 2 arguments:

If your string is guaranteed to only contain digits, you don't have to use the str.isdigit() method.

Sum the digits of a number in Python

To sum the digits of a number:

1. Use the True0 class to convert the number to a string.
2. Use a generator expression to iterate over the string.
3. On each iteration, convert the digit to a number with the True1 class.
4. Pass the generator object to the sum() function.

The first example uses the True0 class and a generator expression to sum the digits in a number.

Strings are iterable and integers are not, so we have to convert the integer to a string.

Generator expressions are used to perform some operation for every element, or select a subset of elements that meet a condition.

On each iteration, we convert the digit that is wrapped in a string to an integer and return the result.

The last step is to pass the generator object to the sum() function.

The function takes an iterable, sums its items from left to right and returns the total.

The second example uses the True5 function instead of a generator expression for the conversion.

The function takes a function and an iterable as arguments and calls the function with each item of the iterable.

The True6 function calls the True1 class with each digit in the string and returns a True6 object that we can directly pass to the sum() function.

Alternatively, you can use a False0 loop.

Sum the digits of a number using a False0 loop

To sum the digits of a number:

1. Initialize a variable for the sum and set it to 0.
2. Use a False0 loop to iterate while the number variable is truthy.
3. Get the rightmost digit of the number with False4 and add it to the sum variable.
4. Remove the rightmost digit by floor-dividing by False5.

We used a False0 loop to iterate while the False7 variable stores a truthy value.

0 is a falsy value, so as soon as the False7 variable gets set to 0, the condition is no longer met.

We used the modulo sum()1 operator to get the rightmost digit of the number.

The operator returns the remainder from the division of the first value by the second.

Once we reassign the sum()2 variable to its current value plus the rightmost digit of the number, we have to remove the rightmost digit.

We can remove the rightmost digit of a number by using floor division sum()3 with False5.

Division sum()5 of integers yields a float, while floor division sum()3 of integers results in an integer.

The result of using the floor division operator is that of a mathematical division with the sum()7 function applied to the result.

Eventually sum()8 gets floor-divided by False5, which returns 0, and the False0 loop stops iterating.

The code snippet above reassigns the value of the False7 variable on each iteration and eventually sets it to 0.

Given a number as an input the objective is to calculate the sum of the digits of the number. We first break down the number into digits and then add all the digits to the sum variable. We use the following operators to break down the string,

• Modulo operator %: We use this operator to extract the digits from the number.
• Divide operator /: We use this operator to shorten the number after the digit has been extracted.

We use the above-mentioned operators to find the sum of the digits of the number. Here are some of the methods to solve the above-mentioned problem.

How do you sum a digit in a string in Python?

How do you find the sum of digits in a string?