/**
* Returns the N-th digit of a number counting from the left.
*
* Examples:
* getDigitFromLeft(12345, 1) === 1
* getDigitFromLeft(12745, 3) === 7
*
* @param {number} number - The input integer.
* @param {number} position - The digit position (1-based, from the left).
* @returns {number} The digit at the specified position.
* @throws {RangeError} If position is out of range.
*/
function getDigitFromLeft(number, position) {
const digits = Math.abs(number).toString();
if (
!Number.isInteger(position) ||
position < 1 ||
position > digits.length
) {
throw new RangeError("Position is out of range.");
}
return Number(digits[position - 1]);
}
// Example usage
console.log(getDigitFromLeft(12345, 1));
console.log(getDigitFromLeft(12745, 3));
/*
run:
1
7
*/
