README-IntegerUtils.md

IntegerUtils

• Ensure each of the test cases in the class IntegerUtilsTest successfully passes upon completion of each of the method stubs in the class IntegerUtils.
  • Integer getSumOfN(int n)
  • Integer getProductOfN(int n)
  • Integer reverseDigits(int val)

Integer getSumOfN(Integer n)

• Description
  • Given an Integer, n, return the sum of all integers from 0 up to and including n

Example

• Sample Script

  // : Given
  Integer input = 4;
  
  // : When
  Integer outcome = IntegerUtils.getSumOfN(input);
  
  // : Then
  System.out.println(outcome);
  

• Sample Output

  10
  

Integer getProductOfN(Integer n)

• Description
  • Given an Integer , n, return the product of all integers from 0 up to and includingg n.

Example

• Sample Script

  // : Given
  Integer input = 7;
  
  // : When
  Integer outcome = IntegerUtils.getProductOfN(input);
  
  // : Then
  System.out.println(outcome);
  

• Sample Output

  5040
  

Integer reverseDigits(Integer n)

• Description
  • Given an Integer, n, return integer an with identical digits in the reverse order

Example

• Sample Script

  // : Given
  Integer input = 12345
  
  // : When
  Integer outcome = IntegerUtils.reverseDigits(input);
  
  // : Then
  System.out.println(outcome);
  

• Sample Output

  54321