Decision and Loop Control Structures..

Covers if , if-else , nested if-else , switch case  and for , while , do-while , for-each . . . . . . .

Author: ritskasar

AvgFunction.java

@@ -0,0 +1,24 @@
+import java.util.*;
+class AvgFunction
+{
+	public static void Average(int a,int b,int c)
+	{
+		float Avg = (a+b+c)/3;
+		System.out.println("Average of given number : " +Avg);
+
+		return;
+	}
+	public static void main(String [] args)
+	{
+		Scanner in = new Scanner(System.in);
+
+		System.out.println("Enter any three number");
+
+		int a=in.nextInt();
+		int b=in.nextInt();
+		int c=in.nextInt();
+
+		Average(a,b,c);
+
+	}
+}

Calculator.java

@@ -0,0 +1,71 @@
+import java.util.*;
+class Calculator{
+
+	public static void main(String args[])
+	{
+
+	Scanner in = new Scanner(System.in);
+	float no1,no2,add,sub,mul,div,total,avg;
+	int ch;
+
+	do
+	{
+       System.out.println("Enter Number 1 and Number 2 : ");
+	   	no1=in.nextFloat();
+	   	no2=in.nextFloat();
+
+       System.out.println("Enter your choise :\n1.Addition\n2.Substraction \n3.Multiplication \n4.Division \n5.Total \n6.Average");
+	   ch=in.nextInt();
+
+
+
+	switch(ch)
+	 {
+
+
+			 case 1:
+					 add=no1+no2;
+					 System.out.println("Addition = "+add);
+					 break;
+
+			 case 2:
+					 sub=no1+-no2;
+					 System.out.println("Substraction = "+sub);
+					 break;
+
+			 case 3:
+					 mul=no1*no2;
+					 System.out.println("Multiplication = "+mul);
+					 break;
+
+			 case 4:
+					 div=no1/no2;
+					 System.out.println("Division = "+div);
+					 break;
+
+
+			 case 5:
+					 total=no1+no2;
+					 System.out.println("Total = "+total);
+					 break;
+
+			 case 6:
+					 avg=(no1+no2)/2;
+					 System.out.println("Average = "+avg);
+					 break;
+			default:
+					System.out.println("Cannot find case");
+
+             }
+		 }while(ch!=0);
+
+	}
+
+}
+
+
+
+
+
+
+

Divisibility.java

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+import java.util.*;
+class Divisibility
+{
+	public static void main(String []args)
+	{
+		Scanner in = new Scanner(System.in);
+		int n , i;
+		System.out.println("Enter any number");
+		n = in.nextInt();
+		for(i=1;i<=100;i++)
+		{
+			if(i%n==0)
+			System.out.println(i);
+		}
+	}
+}

DoHello.java

@@ -0,0 +1,12 @@
+import java.util.*;
+class DoHello
+{
+	public static void main(String [] args)
+	{
+		int i=1;
+		do{
+			System.out.println("Hello World");
+			i++;
+		  }while(i<5);
+	}
+}

Factorial.java

@@ -0,0 +1,16 @@
+import java.util.*;
+class Factorial
+{
+	public static void main(String[]args)
+	{
+		Scanner in = new Scanner(System.in);
+		int i, n, fact=1;
+		System.out.println("Enter any number");
+		n=in.nextInt();
+		for(i=1; i<=n;i++)
+		{
+			fact = fact*i;
+		}
+		System.out.println(fact);
+	}
+}

FibonacciSeries.java

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+import java.util.*;
+class FibonacciSeries
+{
+	public static void FibonacciFuncn(int n)
+	{
+		int a=0,b=1;
+		System.out.println(a +" ");
+		for(int i=1;i<=n;i++)
+		{
+
+			System.out.println(b +" ");
+
+			int temp=b;
+			b=a+b;
+			a=temp;
+
+		}
+
+		return;
+	}
+	public static void main(String [] args)
+	{
+		Scanner in = new Scanner(System.in);
+		System.out.println("Enter limit for fibonacci series");
+		int n=in.nextInt();
+
+		FibonacciFuncn(n);
+
+
+	}
+}

ForEach.java

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+import java.util.*;
+class ForEach
+{
+	public static void main(String []args)
+	{
+		int [] a = {10,20,30,40,50};
+
+		for(int i : a)
+		{
+			System.out.println(i);
+		}
+
+	}
+}

GCDNo.java

@@ -0,0 +1,23 @@
+import java.util.*;
+class GCDNo
+{
+	public static void main(String [] args)
+	{
+		Scanner in = new Scanner(System.in);
+		System.out.println("Enter any two numbers");
+		int n1 = in.nextInt();
+		int n2 = in.nextInt();
+
+		while(n1 != n2)
+		{
+			if(n1>n2)
+			{
+				n1=n1-n2;
+			}else{
+				n2=n2-n1;
+			}
+		}
+
+		System.out.println("GCD is : " +n2);
+	}
+}

Matrix.java

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+import java.util.*;
+class Matrix
+{
+	public static void main(String [] args)
+	{
+		Scanner in = new Scanner (System.in);
+		int i,j,m,n;
+		System.out.println("Enter numbers for matrix row");
+		m=in.nextInt();
+		System.out.println("Enter numbers for matrix column");
+		n=in.nextInt();
+
+		for(i=1;i<3;i++)
+		{
+			for(j=1;j<3;j++)
+			{
+				System.out.print(m + " ");
+			}
+
+			System.out.println(n +" ");
+		}
+
+	}
+}

NestedLoop.java

@@ -0,0 +1,15 @@
+import java.util.*;
+class NestedLoop
+{
+	public static void main(String []args)
+	{
+		for(int i=1;i<5;i++)
+		{
+			for(int j=1;j<i;j++)
+			{
+			System.out.print("*");
+		    }
+		    System.out.println();
+		}
+	}
+}