# ChapterArithmetic/statsMM.py 
"""
his program computes mean.
Enter a number (<Enter> to quit) >> 6
Enter a number (<Enter> to quit) >> 7
Enter a number (<Enter> to quit) >> 8
Enter a number (<Enter> to quit) >> 

The mean is 7.0
""" 
def main():
    print("Compute mean.")
    xStr = input("Enter a number (<Enter> to quit) >> ")
    k = 0 # counts elements
    mysum = 0
    while (xStr != ""):
        x = float(xStr)
        mysum = mysum + x
        k = k + 1
        xStr = input("Enter a number (<Enter> to quit) >> ")
  
    print("\nThe mean is", mysum/k)

main()