
Read numbers from the keyboard and find their sum. Terminate when zero is
entered.

Read strings from keyboard and concatenate them. Print the result
when an empty string is entered.

Read numbers from the keyboard and add them to a list. Print it when
a negative number is given.

Given that ord('a') = 97  and  chr(97) = 'a' . Using those functions,
write a program to generate a string containing all the letters from a to z.


Write a program to add the 2x2 matrices given below.
a = [ [2,3],
      [6,7] ]
      
a = [ [12,13],
      [16,17] ]
      
Generate two random numbers, say x and y, within the range 0 to 1.
Repeat it 10000 times and find out howmany times sqrt(x**2 + y**2) is
less than or equal to 1.





  
