Scala Programming: Compare two strings lexicographically

Scala Programming String Exercise-3 with Solution

Write a Scala program to compare two strings lexicographically.

Note: Two strings are lexicographically equal if they are the same length and contain the same characters in the same positions.

Sample Solution:

Scala Code:

object Scala_String {

  def test(str1: String, str2: String): String = {
    // Compare the two strings.
    val result = str1.compareTo(str2);

    // Display the results of the comparison.
    if (result < 0) {
      ("\"" + str1 + "\"" +
        " is less than " +
        "\"" + str2 + "\"");
    } else if (result == 0) {
      ("\"" + str1 + "\"" +
        " is equal to " +
        "\"" + str2 + "\"");
    } else {
      ("\"" + str1 + "\"" +
        " is greater than " +
        "\"" + str2 + "\"");
    }
  }

  def main(args: Array[String]): Unit = {
    var str1 = "This is Exercise 1";
    var str2 = "This is Exercise 2";

    println("String 1: " + str1);
    println("String 2: " + str2);

    var result = test(str1, str2)
    println(result)
    println("========================")
    str1 = "This is Exercise 1";
    str2 = "This is Exercise 1";

    println("String 1: " + str1);
    println("String 2: " + str2);

    result = test(str1, str2)
    println(result)
    println("========================")
    str1 = "This is Blacky";
    str2 = "This is Black";
    println("String 1: " + str1);
    println("String 2: " + str2);
    result = test(str1, str2)
    println(result)
  }
}

Sample Output:

ring 1: This is Exercise 1
String 2: This is Exercise 2
"This is Exercise 1" is less than "This is Exercise 2"
========================
String 1: This is Exercise 1
String 2: This is Exercise 1
"This is Exercise 1" is equal to "This is Exercise 1"
========================
String 1: This is Blacky
String 2: This is Black
"This is Blacky" is greater than "This is Black"

Scala Code Editor :

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