Removing a specific digit from a number that was specified by the user-CodePudding

I tried to make a Python program that removes specific digit from a number, example a = 12025 k = 2 result is 105, however none of the guides helped me do that, can anybody help me with that?

CodePudding user response：

Conversion to string does not seem elegant. As pseudo-code:

number without digit (number, digit)
    if number == digit
        0
    else if number < 10
        number
    else if number % 10 == digit
        number without digit (number / 10, digit)
    else
        number without digit (number / 10, digit) * 10   (number % 10)

Where / is integer division, truncating the remainder, and % is the modulo, remainder.

So it is a matter of recursion.

CodePudding user response：

You have to convert into str type, then remove the occurrencies, and go back to int

int(str(a).replace(str(k),''))

CodePudding user response：

a = 12025
k = 2
print(int(str(a).replace(str(k), '')))

CodePudding user response：

If you want to use math rather than converting to and from string you can do

a = 12025
k = 2

result = 0
exp = 0
while a:
    a, remainder = divmod(a, 10)
    if remainder != k:
        result = result   10**exp * remainder
        exp  = 1