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Programming 640
Example 4
Example 4Example 4
Example 4
This example uses built-in functions to calculate the result without using a loop.
Ê
Prompts for input on Program I/O.
Ë Calculates sum.
Ì Displays output on Program I/O screen.
Note:
Because Input returns n as a number, you do not need to use expr to convert n.
Ê
Ë
Ì
:prog4()
:Prgm
:Input "Enter an integer",n
:sum(seq(i,i,1,n))!temp
:Disp temp
:EndPrgm
Function Used in this example to:
seq Generate the sequence of integers from 1 to n.
sum Sum the integers in the list generated by seq.
seq(expression, var, low, high [,step])
Ê expression used to generate the sequence
Ë variable that will be incremented
Ì initial and final values of var
Í
increment for var ; if omitted, uses 1
ÊËÌÌÍ