Added Temperature Conversion file

src/main/java/com/thealgorithms/conversions/TemperatureConversion.java

@@ -0,0 +1,77 @@
+package com.thealgorithms.conversions;
+
+import java.util.Scanner;
+
+/**
+ * This class converts Decimal numbers to Octal Numbers
+ */
+public class TemperatureConversion {
+
+    /**
+     * Main Method
+     *
+     * @param args Command line Arguments
+     */
+
+    // enter in a decimal value to get Octal output
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+
+        System.out.println("Temperature Converter");
+
+        while (true) {
+            System.out.println("Enter the temperature value:");
+            double value = scanner.nextDouble();
+
+            System.out.println("Enter the scale of the input temperature (C/F/K):");
+            String inputScale = scanner.next().toUpperCase();
+
+            System.out.println("Enter the scale you want to convert to (C/F/K):");
+            String outputScale = scanner.next().toUpperCase();
+
+            double result = convertTemperature(value, inputScale, outputScale);
+            System.out.println("Converted temperature: " + result + " " + outputScale);
+
+            System.out.println("Do you want to convert another temperature? (yes/no)");
+            String continueChoice = scanner.next().toLowerCase();
+            if (!continueChoice.equals("yes")) {
+                System.out.println("Exiting the program...");
+                break;
+            }
+        }
+
+        scanner.close();
+    }
+
+    public static double convertTemperature(double value, String inputScale, String outputScale) {
+        double result = 0;
+
+        if (inputScale.equals("C")) {
+            if (outputScale.equals("F")) {
+                result = (value * 9 / 5) + 32;
+            } else if (outputScale.equals("K")) {
+                result = value + 273.15;
+            } else {
+                result = value; // Same scale conversion
+            }
+        } else if (inputScale.equals("F")) {
+            if (outputScale.equals("C")) {
+                result = (value - 32) * 5 / 9;
+            } else if (outputScale.equals("K")) {
+                result = (value + 459.67) * 5 / 9;
+            } else {
+                result = value; // Same scale conversion
+            }
+        } else if (inputScale.equals("K")) {
+            if (outputScale.equals("C")) {
+                result = value - 273.15;
+            } else if (outputScale.equals("F")) {
+                result = (value * 9 / 5) - 459.67;
+            } else {
+                result = value; // Same scale conversion
+            }
+        }
+
+        return result;
+    }
+}

src/test/java/com/thealgorithms/conversions/TemperatureConversionTest.java

@@ -0,0 +1,19 @@
+package com.thealgorithms.conversions;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import org.junit.jupiter.api.Test;
+
+public class TemperatureConversionTest {
+
+    @Test
+    public void testTemperatureConversion()
+    {
+        assertEquals(211.6, TemperatureConversion.convertTemperature(79, "C", "F"));
+        assertEquals(411.15, TemperatureConversion.convertTemperature(138, "C", "K"));
+        assertEquals(11.67, TemperatureConversion.convertTemperature(53, "F", "C"));
+        assertEquals(293.7055555555556, TemperatureConversion.convertTemperature(69, "F", "K"));
+        assertEquals(-123.15, TemperatureConversion.convertTemperature(150, "K", "C"));
+        assertEquals(-99.67, TemperatureConversion.convertTemperature(200, "K", "F"));
+    }
+}