new

tutorial/CalMinNumOfCoins.java

@@ -0,0 +1,28 @@
+package tutorial;
+
+import java.util.Scanner;
+
+public class CalMinNumOfCoins {
+    public static void main(String[] args) {
+		
+		Scanner input = new Scanner(System.in);
+		
+		int amount;
+		int coinTen, coinFive, coinTwo, coinOne;
+		
+		System.out.print("Input an amount: ");
+		amount = input.nextInt();
+		
+		coinTen = amount / 10;
+		coinFive = (amount % 10) / 5;
+		coinTwo = ((amount % 10)% 5) / 2;
+		coinOne = (((amount % 10)% 5)%2) / 1;
+		
+		System.out.println("The minimum numbers of coins for " + amount + " are:");
+		System.out.println(coinTen + " 10-dollar coin(s)");
+		System.out.println(coinFive + " 5-dollar coin(s)");
+		System.out.println(coinTwo + " 2-dollar coin(s)");
+        System.out.println(coinOne + " 1-dollar coin(s)");
+        	
+    }
+}

tutorial/CalSumOfGeo.java

@@ -0,0 +1,30 @@
+//Math.pow(R,n), R to the power of n
+//a * R to the power of n and divided by R - 1
+
+package tutorial;
+
+import java.util.Scanner;
+
+public class CalSumOfGeo {
+    public static void main(String[] args){
+        double a, R, n;
+        Scanner input = new Scanner(System.in);
+    
+    double sumofGS;
+    
+    System.out.print("Enter the first number of the sequence: ");
+        a = input.nextDouble();
+    
+    System.out.print("Enter the common ratio of the sequence: ");
+        R = input.nextDouble();
+    
+    System.out.print("Enter the number of the terms of the sequence: ");
+        n = input.nextDouble();
+    
+    sumofGS = (a*(Math.pow(R,n)-1))/(R-1);
+    
+    System.out.print("The sum of Geometric Series: ");
+    System.out.printf("%1.1f\n" , sumofGS);
+                
+    }
+}