504. Base 7

Given an integer, return its base 7 string representation.

Example 1:

Input: 100
Output: "202"

Example 2:

Input: -7
Output: "-10"

Note: The input will be in range of [-1e7, 1e7].

# @lc code=start
using LeetCode

function convert_to_base7(num::Int)::String
    num == 0 && return "0"
    sign = num < 0 ? -1 : 1
    num *= sign
    res = Int[]
    while num > 0
        push!(res, num % 7)
        num ÷= 7
    end
    reverse!(res)
    return sign != -1 ? join(res) : "-" * join(res)
end

# @lc code=end

convert_to_base7 (generic function with 1 method)

This page was generated using DemoCards.jl and Literate.jl.