504, Base 7

Problem

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Given an integer num, return a string of its base 7 representation.

Example 1:

Input: num = 100
Output: "202"

Example 2:

Input: num = -7
Output: "-10"

Constraints:

• -107 <= num <= 107

Solution

/**
 * @param {number} num
 * @return {string}
 */
var convertToBase7 = function(num) {
    return parseInt(num, 10).toString(7)
};