### Archive

Archive for January 4, 2009

## Java Program to add two matrices – Q8

Q8: Java Program to add two matrices

… from College notes (BCA/MCA assignments):

```class matrix_add{
public static void main(String args[]){
int mat1[][] = { {1,2,3},
{4,5,6},
{7,8,9} };
int mat2[][] = { {9,8,7},
{6,5,4},
{3,2,1} };

int tot[][] = new int[3][3];
int i, j;

for(i=0; i<3; i++){
for(j=0; j<3; j++){
tot[i][j] = mat1[i][j] + mat2[i][j];
}
}
for(i=0; i<3; i++){
for(j=0; j<3; j++){
System.out.print(" " + tot[i][j]);
}
System.out.println();
}
}
}
```

Categories: Java

## Java Program to find n prime number – Q7

Q7: Java Program to find n prime number

Prime Number is a natural number greater than 1 that has no positive divisors other than 1 and itself.
For example: 2, 3, 5, 7, 11, 13, 19, 23, 29, etc.

```class primeupto{
public static void main(String args[]){
boolean pr = false;
int a = Integer.parseInt(args[0]);
System.out.print("Prime Numbers upto " + a + " are: " + 2);
for(int i=3; i<a; i++){
for(int j=2; j<i; j++){
if(i % j == 0){
pr = false;
break;
}
else
pr = true;
} // end of for 2
if(pr==true)
System.out.print(" " + i);
} // end of for 1
} // end of main
} // end of class primeupto
```

… from College notes (BCA/MCA assignments):

Categories: Java