(89) :∑(expression, var, low, high)
Summation. The var is the variable in the expression that varies. The low is the low value, and high is the high value.
This can be used as a shortcut for
- 2ND + 5 (Math)
:sumOfSqr() :Disp ∑(x^2,x,1,5) :Disp ∑(x,x,1,100)
This prints then , or 55 and 5050 respectively.