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Assignment-1/CfcA1.java

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+import java.util.*;
+public class CfcA1 {
+    public static void main(String[] args){
+        Scanner sc = new Scanner(System.in);
+        int credits;
+        System.out.println("Enter the credits");
+        credits = sc.nextInt();
+        if(credits>=7500){
+            System.out.println("Tera Leader");
+        }
+        else if(credits>=6000){
+            System.out.println("Gega Leader");
+        }
+        else if(credits>=4500){
+            System.out.println("Mega Leader");
+        }
+        else{
+            System.out.println("Rising Star");
+        }
+    }
+
+}

Assignment-1/CfcA2.java

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+import java.util.*;
+public class CfcA2 {
+    public static void main(String[] args){
+        int amt,r,t,si;
+        Scanner sc = new Scanner(System.in);
+        System.out.println("Enter the amount, rate & time");
+        amt = sc.nextInt();
+        r = sc.nextInt();
+        t = sc.nextInt();
+        si = (amt*r*t)/100;
+        System.out.println("Simple Interest :"+si);
+
+    }
+
+}

Assignment-1/CfcA3.java

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+import java.util.*;
+public class CfcA3 {
+    public static void main(String[] args){
+        Scanner sc=new Scanner(System.in);
+        int a,b,gcd=0;
+        System.out.println("Enter two numbers");
+        a = sc.nextInt();
+        b = sc.nextInt();
+        for(int i=1; i<=a && i<=b; i++){
+            if(a%i==0 && b%i==0)
+                gcd=i;
+        }
+        System.out.println("GCD is:"+gcd);
+    }
+
+}

Assignment-1/CfcA4.java

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+public class CfcA4 {
+    public static void main(String[] args){
+        int n=5,i=0,j=0,s=2;
+        while(i!=n){
+            s=s+j;
+            System.out.print(s + ",");
+            i++;
+            j=4*i;       
+        }
+    }
+}
+

Assignment-1/CfcA5.java

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+import java.util.*;
+public class CfcA5 {
+    public static void main(String[] args){
+        Scanner sc = new Scanner(System.in);
+        int n, count=0;
+        System.out.println("Enter the number");
+        n= sc.nextInt();
+        while(n!=0){
+            n=n/10;
+            count++;
+        }
+        System.out.println("The number of digits:"+count);
+    }
+
+}

Assignment-1/CfcA6.java

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+import java.util.*;
+public class CfcA6 {
+    public static void main(String[] args){
+        int n,rev=0;
+        Scanner sc = new Scanner(System.in);
+        System.out.println("Enter a number");
+        n = sc.nextInt();
+        while(n!=0){
+        rev=rev*10 + n%10;
+        n=n/10;
+        }
+        System.out.println(rev);
+    }
+
+}

Assignment-2/BaseConversion.java

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+public class BaseConversion {
+    public static void decToBin(int n){
+        int ans=0,pow=0;
+        while(n != 0){
+            ans = (int)Math.pow(10, pow) * (n % 2)+ans;
+            pow++;
+            n = n/2;
+        }
+        System.out.println(ans);
+    }
+    public static void binToDec(int n){
+        int ans=0,pow=0;
+        while(n != 0){
+            ans = (int)Math.pow(2, pow) * (n % 10)+ans;
+            pow++;
+            n= n/10;
+        }
+        System.out.println(ans);
+    }
+    public static void decToOctal(int n){
+        int ans=0,pow=0;
+        while(n != 0){
+            ans = (int)Math.pow(10, pow) * (n % 8)+ans;
+            pow++;
+            n = n/8;
+        }
+        System.out.println(ans);
+    }
+    public static void octalToDec(int n){
+        int ans=0,pow=0;
+        while(n != 0){
+            ans = (int)Math.pow(8, pow) * (n % 10)+ans;
+            pow++;
+            n = n/10;
+        }
+        System.out.println(ans);
+    }
+    public static void main(String args[]){
+        decToBin(19);
+        binToDec(10011);
+        decToOctal(154);
+        octalToDec(232);
+    }
+
+}

Assignment-2/CheckChar.java

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+import java.util.*;
+public class CheckChar {
+    public static void main(String[] args){
+        Scanner sc = new Scanner(System.in);
+        char ch;
+        System.out.println("Enter a character");
+        ch = sc.next().charAt(0);
+        if(ch>='A' && ch<='Z')
+            System.out.println("Upper Case");
+        else if(ch>='a' && ch<='z')
+            System.out.println("Lower Case");
+        else{
+            System.out.println("Invalid Input");
+        }    
+    }
+
+}

Assignment-2/CheckSortedOrNot.java

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+public class CheckSortedOrNot {
+    public static void main(String[]args){
+        int flag=0;
+        int arr[]={13,25,45,55,62,79,2,94};
+        for(int i=0;i<arr.length-1;i++){
+            if(arr[i+1]<arr[i])
+                flag++;
+        }
+        if(flag==0){
+            System.out.println("Sorted");
+        }
+        else{
+            System.out.println("Not Sorted");
+        }
+    }
+}

Assignment-2/GCDnLCM.java

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+import java.util.*;
+public class GCDnLCM {
+    public static void gcd(int a,int b){
+        int ans = 0;
+        for(int i=2;i<=a && i<=b;i++){
+              if(a % i ==0 && b % i ==0)
+                  ans = i;
+        }
+        System.out.println("GCD is "+ ans);
+    }
+    public static void lcm(int a,int b){
+       int i,max;
+       max = (int)Math.max(a,b);
+       while(true){
+           if(max % a == 0 && max % b == 0){
+               System.out.println("LCM is "+max);
+               break;
+           }
+           max++;
+       }
+    }
+    public static void main(String[]args){
+        int a,b;
+        Scanner sc = new Scanner(System.in);
+        a = sc.nextInt();
+        b = sc.nextInt();
+        gcd(a,b);
+        lcm(a,b);
+
+    }
+}

Assignment-2/PairSum.java

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+import java.util.*;
+public class PairSum {
+    public static void checkPairSum(int arr[],int target){
+           for(int i=0;i<arr.length;i++){
+               for(int j=i+1;j<arr.length;j++){
+                   if(arr[i]+arr[j]==target){
+                       System.out.println(arr[i]+","+arr[j]);
+                   }
+               }
+           }
+    }
+    public static void main(String args[]){
+        Scanner sc = new Scanner(System.in);
+        int arr[]=new int[10];
+        int target;
+        System.out.println("Enter the values in an array");
+        for(int i=0;i<arr.length;i++){
+            arr[i]=sc.nextInt();
+        }
+        System.out.println("Enter the target value");
+        target=sc.nextInt();
+        checkPairSum(arr,target);
+
+    }
+}

Assignment-2/ReverseAnum.java

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+import java.util.*;
+public class ReverseAnum {
+    public static void main(String[] args){
+        int n,rev=0;
+        Scanner sc = new Scanner(System.in);
+        System.out.println("Enter a number");
+        n = sc.nextInt();
+        while(n!=0){
+        rev=rev*10 + n%10;
+        n=n/10;
+        }
+        System.out.println(rev);
+    }
+
+}

Assignment-2/SortBinArr.java

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+public class SortBinArr {
+    public static void main(String[]args){
+        int arr[]={0,1,0,1,1,0,1,0,1,1,1,0,0,0,1};
+        for(int i=0;i<arr.length;i++){
+            for(int j=0;j<arr.length-1;j++){ 
+            if(arr[j]==1&&arr[j+1]==0){
+                arr[j+1]=1;
+                arr[j]=0;
+            }
+        }
+        }
+        for(int i=0;i<arr.length;i++){
+            System.out.print(arr[i]+" ");
+        }
+    }
+}

Assignment-2/calculator.java

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+import java.util.*;
+public class calculator {
+    public static void main(String[] args){
+        Scanner sc = new Scanner(System.in);
+        int n1,n2;
+        char ch;
+        System.out.println("Enter two numbers");
+        n1 = sc.nextInt();
+        n2 = sc.nextInt();
+        System.out.println("Enter ch");
+        ch = sc.next().charAt(0);
+        switch(ch){
+            case '*':
+            System.out.println(n1*n2);
+            break;
+            case '/':
+            System.out.println(n1/n2);
+            break;
+            case '%':
+            System.out.println(n1%n2);
+            break;
+            case '+':
+            System.out.println(n1+n2);
+            break;
+            case '-':
+            System.out.println(n1-n2);
+            break;
+            default:
+            System.out.println("invalid input");
+        }
+    }
+}

Assignment-2/countMultipleOfn.java

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+import java.util.*;
+public class countMultipleOfn {
+    public static void main(String[]args){
+        Scanner sc = new Scanner(System.in);
+        int arr[] = new int[10];
+        System.out.println("Enter elements of the array:");
+        for(int i = 0;i < arr.length;i++){
+           arr[i] = sc.nextInt();
+        }
+        int c=0;
+        for(int i = 0;i < arr.length;i++){
+            if(arr[i]%5==0)
+                c++;      
+        }
+        System.out.println( "count"+c);  
+    }
+}

Assignment-2/countPrimeNum.java

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+import java.util.*;
+public class countPrimeNum {
+    public static boolean isPrime(int n){
+        if (n < 2) {
+            return false;
+        }
+        for (int i = 2; i <= Math.sqrt(n); i++) {
+            if (n % i == 0) {
+                return false;
+            }
+        }
+        return true;
+    }
+    public static int countPrime(int [] arr){
+        int count = 0;
+        for (int i = 0; i < arr.length; i++) {
+            if (isPrime(arr[i])) {
+                count++;
+            }
+        }
+        return count;
+    }
+    public static void main(String[]args){
+        Scanner sc = new Scanner(System.in);
+        int arr[] = new int[10];
+        System.out.println("Enter elements of the array:");
+        for(int i = 0;i < arr.length;i++){
+           arr[i] = sc.nextInt();
+        }
+        System.out.println("Count:"+ countPrime(arr));
+    }
+}   

Assignment-2/reverseAnArr.java

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+public class reverseAnArr {
+    public static void main(String[]args){
+        int arr[]={4,1,75,9,8,6,0,2};
+        int temp,l=0,h=arr.length-1;
+        while(l<h){
+            temp=arr[l];
+            arr[l]=arr[h];
+            arr[h]=temp;
+            l++;
+            h--;
+
+        }
+        for(int ele: arr){
+            System.out.println(ele);
+        }
+    }    
+}

Assignment-2/sortOddnEven.java

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+public class sortOddnEven {
+    public static void sort(int arr[]){
+        for(int i=0;i<arr.length;i++){
+            for(int j=0;j<arr.length-i-1;j++){
+                if(arr[j]%2!=0 && arr[j+1]%2==0){
+                    int temp=arr[j];
+                    arr[j]=arr[j+1];
+                    arr[j+1]=temp;
+                }
+            }
+        }
+        for(int ele: arr){
+            System.out.println(ele);
+        }
+
+    }
+    public static void main(String[]args){
+        int arr[]={3,8,5,13,6,12,18,5};
+        sort(arr);
+    }
+
+}