#0165

Normalize Phone Digits

EasyPython15 min10 XP

Problem

Given a phone-like string, return only its digits in their original order.

Why This Matters

Text cleaning is often the difference between clean joins and broken customer/user matching.

Function Signature

def phone_digits(text):

Examples

Example 1

Input"+91 (987) 654-3210"

Output"919876543210"

Symbols, spaces, and parentheses are removed; digit order is preserved.

Constraints

Return the exact requested output.
Handle ordinary edge cases.
Prefer simple, interview-readable code.

CodePython

def phone_digits(text):
    """
    Input example: "+91 (987) 654-3210"
    Return: "919876543210"
    Return the value from the function so the tests can compare it. Do not print unless the prompt asks.
    """
    # write your code here
    return ""

def phone_digits(text):
    """
    Input example: "+91 (987) 654-3210"
    Return: "919876543210"
    Return the value from the function so the tests can compare it. Do not print unless the prompt asks.
    """
    # write your code here
    return ""

Visible browser tests run here when available.

Testcases1 visible / 3 hidden categories

Core example

Input"+91 (987) 654-3210"

Expected"919876543210"

Symbols, spaces, and parentheses are removed; digit order is preserved.

Hidden Test Categories

empty or minimal inputduplicates or tieslarger input