Added a program

[GenDelta]

I have added a java program which does the following:

• It takes the order of two matrices as input.
• Then it checks if multiplicatipn between the two is possible or not.
• If it is possible, the flow of code is continued but if it is not possible then the program terminates.
• Then, three for loops are used to calculate the product of the two matrices and the results are stored in a third matrix.
• The resultant matrix is then printed.

Feel free to go through the code and then merge the pull request if you are satisfied with this contribution.

[GenDelta]

I have added another java program which does the following tasks:

• Takes a lower bound as input.
• Take an upper bound as input.
• Iterates from the lower bound to the upper bound.
• Checks if current value of control variable i is a prime number or not by calling function isPrime()
• If isPrime() returns true, the value of i gets printed.
• If isPrime() returns false, nothing is printed and the loop moves to the next iteration.
• The loop stops once the terminating condition is reached.
• The program terminates.

Go through the above commits and if you feel satisfied with my contributions, kindly merge them to the main branch.