package com.examplehub.maths;

public class GetTheFirstDigit {

  /**
   * Get the first digit of a number.
   *
   * @param number the number to be checked.
   * @return the first digit of given number.
   */
  public static int firstDigit(int number) {
    number = Math.abs(number);
    while (number >= 10) {
      number /= 10;
    }
    return number;
  }

  /**
   * Get the first digit of a number using string.
   *
   * @param number the number to be checked.
   * @return the first digit of given number.
   */
  public static int firstDigitByString(int number) {
    number = Math.abs(number);
    return Integer.parseInt(("" + number).substring(0, 1));
  }
}