SIMSCRIPT II.5 Programming Language

Programming Language Concepts
for I = 1 to 6,
with (I < N and X(I) < X(I+1)) or I = N,
compute
NX as the number, SUMX as the sum, NM as the mean,
SSQX as the sum.of.squares, MSQX as the mean.square,
VARX as the variance, SDVX as the std.dev,
MINX as the minimum,
MAXX as the maximum, MINI as the min(I) of X(I)
The above statement iterates the control variable I over the values 1, 2, 3, 4, 5, and 6, and
selects only those values for inclusion in the compute statement computations for which I < 5
and X(I) < X(I+1), or for which I equals 5. Thus, it selects X(2), and X(4) under condition 1
and X(5) under condition 2. For these index numbers, the statistical quantities are computed for
the expression X(I). The computed statistics are:
Computed
Variable Statistic Computation
NX NUMBER 4
SUMX SUM 4.0 + 7.3 + 0.5 + 2.2 = 14.0
NM MEAN 14.0 / 4 = 3.5
SSQX SUM.OF.SQUARES (4.0) 2 + (7.3) 2 + (0.5) 2 + (2.2) 2 =
74.38
MSQX MEAN. SQUARE 74.38 / 4 = 18.595
VARX VARIANCE 18.595 - 3.52 = 6.345
SDVX STD.DEV SQRT.F(6.345) = 2.52
MINX MINIMUM 0.5
MAXX MAXIMUM 7.3
MINI MIN(I) 4
3.4 Input/Output Statements
The read, write, and list statements as described so far provide facilities to:
1. Read data in free form from an input data stream
2. Display messages and computational results in picture like formats
3. Generate labeled output data in a standard predefined format. No mention has been made
of any selection capability for the source of input data or the destination of output data.
In practice, you may desire to associate an input or output data stream with any one of the variety
of input and output devices, such as terminals, tape drives, or line printers, which may be connected
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