/** Takes in an value and returns if it is a number
* @param {any} val - The input value
* @returns {boolean} - Is val a number
*/
function isNumber() {
}
/** Takes in a value and returns whether it is truthy
* @param {any} val - The input value
* @returns {boolean} - Is val truthy
*/
function isTruthy() {
}
/** Takes in a string, coverts it to an integer and doubles it. Returns NaN if the string is not able to be converted to a number.
* @param {string} str - The input string
* @returns {number} - The string converted to a number and doubled
*/
function doubleStr() {
}
module.exports = {
isNumber,
isTruthy,
doubleStr
}