if and for loop

How to write a program for the following statements:

Cpv=0 if vi is less than equal to 10

          15 
Cpv=(1/15)∑(Vi^2-100)  if vi is more than 10
          i=1

Cpp=0 if Pj is greater than or equal to 18

    50
Cpp=∑(18-Pj)   if Pj is less than 18
    j=1

kindly help me out. Thanks in advance