Convert Number Bases | Dataford Interview Questions

Given a number represented as a string in base 10, how do you convert it into base 7?

Implement the conversion without converting the entire input to a built-in integer, so the method supports values larger than native numeric types. Preserve a leading minus sign for negative inputs and normalize leading zeros.

Input: A string containing an optional - followed by decimal digits. Output: Its base-7 representation as a string.

Constraints

1 <= len(num) <= 1000
num contains an optional leading '-' followed by decimal digits
The input represents a valid integer
The output must be produced without converting the complete input to a built-in integer

Function Signature

def convert_to_base7(num):

Your question is Convert Number Bases. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.

Problem

Given a number represented as a string in base 10, how do you convert it into base 7?

Input: A string containing an optional - followed by decimal digits. Output: Its base-7 representation as a string.

Constraints

1 <= len(num) <= 1000
num contains an optional leading '-' followed by decimal digits
The input represents a valid integer
The output must be produced without converting the complete input to a built-in integer

Function Signature

def convert_to_base7(num):

Your question is Convert Number Bases. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.