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(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

:0→x
:For var, low, high
::x+expression→x
:EndFor
:return x

LocationEdit

  • 2ND + 5 (Math)
  • B:Calculus
  • 4:∑(

ExampleEdit

:sumOfSqr()
:Disp ∑(x^2,x,1,5)
:Disp ∑(x,x,1,100)

This prints \sum_{x=1}^5 x^2 then \sum_{x=1}^{100} x, or 55 and 5050 respectively.

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