Java/src/main/java/com/examplehub/maths/Range.java at list · letscode-17/Java · GitHub

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package com.examplehub.maths;

import java.util.ArrayList;
import java.util.List;

public class Range {
  public static int[] range(int n) {
    List<Integer> numbers = new ArrayList<>();
    for (int i = 0; i < n; ++i) {
      numbers.add(i);
    }
    return numbers.stream().mapToInt(i -> i).toArray();
  }

  public static int[] range(int start, int end) {
    List<Integer> numbers = new ArrayList<>();
    for (int i = start; i < end; ++i) {
      numbers.add(i);
    }
    return numbers.stream().mapToInt(i -> i).toArray();
  }

  public static int[] range(int start, int end, int step) {
    List<Integer> numbers = new ArrayList<>();
    for (int i = start; i < end; i += step) {
      numbers.add(i);
    }
    return numbers.stream().mapToInt(i -> i).toArray();
  }
}