PracticeUp | Java Programming

Output: Random Numbers: *************** 47 60 18 9 67 ---------------- Random Numbers: *************** 78 68 14 79 69 Click Here For  Java Online Compiler Solution: import java.util.* ; class GenerateRandomNumbers { public static void main ( String [] args ) { Random r = new Random (); int howManyRandom = 5; System . out . println ( "Random Numbers:" ); System . out . println ( "***************" ); for ( int i = 1; i <= howManyRandom ; i ++) { System . out . println ( r . nextInt (100)); //Here 100 shows that random number } //will not exceed 100 } }

Output: *** Factorial Using For LOOp Only *** Find Factorial Of: 4 Factorial of 4 is: 24 Click Here For  Java Online Compiler Solution: import java.util.Scanner ; class FactorialUsingForLoop { public static void main ( String [] args ) { Scanner scanner = new Scanner ( System . in ); System . out . println ( "*** Factorial Using For LOOp Only ***" + "\n" ); System . out . print ( "Find Factorial Of: " ); int factorialOf = scanner . nextInt (); long fact = 1; for ( int i = 1; i <= factorialOf ; i ++) { fact = fact * i ; } System . out . println ( "Factorial of " + factorialOf + " is: " + fact ); } }

Output: *** Fibonacci Series Using For Loop *** Fibonacci Series upto 7 numbers: 0 1 1 2 3 5 8 Click Here For  Java Online Compiler Solution: public class FibonacciSeriesUsingForLoop { public static void main ( String [] args ) { int count = 7; int num1 = 0; int num2 = 1; System . out . println ( "*** Fibonacci Series Using For Loop ***" + "\n" ); System . out . print ( "Fibonacci Series upto " + count + " numbers: " ); for ( int i = 1; i <= count ; ++ i ) { System . out . print ( num1 + " " ); int sumOfPrevTwo = num1 + num2 ; num1 = num2 ; num2 = sumOfPrevTwo ; } } }

Output: *** Sum of Natural Numbers *** Enter the value of n: 10 Sum of first 10 natural numbers is: 55 Click Here For  Java Online Compiler Solution: import java.util.Scanner ; public class SumOfNNaturalNums { public static void main ( String [] args ) { int num = 0; int total = 0; System . out . println ( "*** Sum of Natural Numbers ***" + "\n" ); System . out . print ( "Enter the value of n: " ); Scanner scan = new Scanner ( System . in ); num = scan . nextInt (); for ( int i = 1; i <= num ; i ++) { total = total + i ; } System . out . println ( "Sum of first " + num + " natural numbers is: " + total ); } }

Output: *** Sum Of Natural Numbers Using FOR Loop *** For lOOp used !!! Sum of first 10 natural numbers is: 55 Click Here For  Java Online Compiler Solution: public class SumNaturalForLoop { public static void main ( String [] args ) { int num = 10; // <------ How many numbers??? int count ; int total = 0; for ( count = 1; count <= num ; count ++) { total = total + count ; } System . out . println ( "*** Sum Of Natural Numbers Using FOR Loop ***" + "\n" ); System . out . println ( "For lOOp used !!!" + "\n" ); System . out . println ( "Sum of first 10 natural numbers is: " + total ); } }

Output: *** Second Smallest Number In Array *** Original Array is: [-10, 42, 90, 21, 72, -3] Second smallest number is : -3 Click Here For  Java Online Compiler Solution: import java.util.Arrays ; public class SecondSmallestInArray { public static void main ( String [] args ) { int [] array = {-10, 42, 90, 21, 72, -3}; System . out . println ( "*** Second Smallest Number In Array ***" + "\n" ); System . out . println ( "Original Array is: " + Arrays . toString ( array )); int min = Integer . MAX_VALUE ; int secondMin = Integer . MAX_VALUE ; for ( int i = 0; i < array . length ; i ++) { if ( array [ i ] == min ) { secondMin = min ; } else if ( array [ i ] < min ) { secondMin = min ; min = array [ i ]; } else if ( array [ i ] < secon...

Output: *** Second Largest Number In An Array *** Original array is: [1, 2, 4, 7, 8, 3, 5, 10] Second largest number is : 8 Click Here For  Java Online Compiler Solution: import java.util.Arrays ; class SecondLargestInArray { public static void main ( String [] args ) { int [] array = {1, 2, 4, 7, 8, 3, 5, 10}; int max = array [0]; int secondMax = array [0]; System . out . println ( "*** Second Largest Number In An Array ***" + "\n" ); System . out . println ( "Original array is: " + Arrays . toString ( array )); for ( int i = 0; i < array . length ; i ++) { if ( array [ i ] > max ) { secondMax = max ; max = array [ i ]; } else if ( array [ i ] > secondMax ) { secondMax = array [ i ]; } } System . out . println...

Output: *** Factorial Program *** Enter the number: 10 Factorial of 10 is: 3628800 Click Here For  Java Online Compiler Solution: import java.util.Scanner ; class FactorialInputNumber { public static void main ( String [] args ) { int number ; System . out . println ( "*** Factorial Program ***" + "\n" ); System . out . print ( "Enter the number: " ); Scanner sc = new Scanner ( System . in ); number = sc . nextInt (); long fact = 1; int i = 1; while ( i <= number ) { fact = fact * i ; i ++; } System . out . println ( "Factorial of " + number + " is: " + fact ); } }

Output: *** Factorial Using While lOOp Only *** Factorial of 5 is: 120 Click Here For  Java Online Compiler Solution: class FactorialUsingWhileLoop { public static void main ( String [] args ) { int factorialOf = 5; long fact = 1; int i = 1; while ( i <= factorialOf ) { fact = fact * i ; i ++; } System . out . println ( "*** Factorial Using While lOOp Only ***" + "\n" ); System . out . println ( "Factorial of " + factorialOf + " is: " + fact ); } }

Output: *** Fibonacci Series *** How many numbers you want in the sequence: 7 Fibonacci Series of 7 numbers: 0 1 1 2 3 5 8 Click Here For  Java Online Compiler Solution: import java.util.Scanner ; class FibonacciSeriesUpto { public static void main ( String [] args ) { int howMany = 0; int num1 = 0; int num2 = 1; System . out . println ( "*** Fibonacci Series ***" + "\n" ); System . out . print ( "How many numbers you want in the sequence: " ); Scanner sc = new Scanner ( System . in ); howMany = sc . nextInt (); System . out . print ( "Fibonacci Series of " + howMany + " numbers: " ); int i = 1; while ( i <= howMany ) { System . out . print ( num1 + " " ); int sumOfPrevTwo = num1 + num2 ; num1 = num2 ; num2 = sumOfPrevTwo ;...

Output: *** Fibonacci Series Using While Loop Only *** Fibonacci Series of 10 numbers: 0 1 1 2 3 5 8 13 21 34 Click Here For  Java Online Compiler Solution: class FibonacciSeriesUsingWhileLoop { public static void main ( String [] args ) { int count = 10; int num1 = 0; int num2 = 1; System . out . println ( "*** Fibonacci Series Using While Loop Only ***" + "\n" ); System . out . print ( "Fibonacci Series of " + count + " numbers: " ); int i = 1; while ( i <= count ) { System . out . print ( num1 + " " ); int sumOfPrevTwo = num1 + num2 ; num1 = num2 ; num2 = sumOfPrevTwo ; i ++; } } }

Output: *** Sum Of Natural Numbers Using WHILE Loop *** While lOOp used !!! Sum of first 10 natural numbers is: 55 Click Here For  Java Online Compiler Solution: public class SumNaturalWhile { public static void main ( String [] args ) { int num = 10; // <------ How many numbers??? int count = 1; int total = 0; while ( count <= num ) { total = total + count ; count ++; } System . out . println ( "*** Sum Of Natural Numbers Using WHILE Loop ***" + "\n" ); System . out . println ( "While lOOp used !!!" + "\n" ); System . out . println ( "Sum of first 10 natural numbers is: " + total ); } }

Output: *** Sum Of Digits Of A Number Using Recursion *** Enter the number: 197 Sum Of Digits : 17 Click Here For  Java Online Compiler Solution: import java.util.Scanner ; public class SumDigitsOfNumber { public static void main ( String args []) { Scanner scanner = new Scanner ( System . in ); System . out . println ( "*** Sum Of Digits Of A Number ***" + "\n" ); System . out . print ( "Enter the number: " ); int number = scanner . nextInt (); int sum = 0; int num = number ; System . out . println ( "The number is: " + number ); while ( num > 0) { int lastDigit = num % 10; sum += lastDigit ; num /= 10; } System . out . println ( "Sum of digits : " + sum ); } }

Output: *** Whether Number Is EVEN Or ODD *** Enter an Integer number: 8 8 is an EVEN number . Click Here For  Java Online Compiler Solution: import java.util.Scanner ; public class CheckOddEven { public static void main ( String args []) { int num ; System . out . println ( "*** Whether Number Is EVEN Or ODD ***" + "\n" ); System . out . print ( "Enter an Integer number: " ); Scanner input = new Scanner ( System . in ); num = input . nextInt (); if ( num % 2 == 0) { System . out . println ( num + " is an EVEN number." ); } else { System . out . println ( num + " is an Odd number." ); } } }