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MatrixMultiplication

  import java.util.Scanner; class MatrixMultiplication {      public static void main(String[] args)     {         Scanner s = new Scanner(System.in);                  System.out.println( "enter no of rows and columns of the first matrix" );          int rows1 = s.nextInt();          int cols1 = s.nextInt();         System.out.println( "enter no of rows and columns of the second matrix" );          int rows2 = s.nextInt();          int cols2 = s.nextInt();          if (cols1 != rows2)         {        ...
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FrequencyCountDemo

  import java.util.Scanner; public class FrequencyCountDemo { public static void main(String[] args) { Scanner s = new Scanner(System.in); System.out.println( "Eneter a string" ); String str = s.nextLine(); System.out.println( "Enter a character" ); char ch = s.next().charAt( 0 ); int count = 0 ; for ( int i= 0 ;i<str.length(); i++) { if (str.charAt(i) == ch) count++; } System.out.println( "frequency = " + count); } }
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