IBM Release 1.93 manual Predefined Mathematical Functions, Arithmetic Operators

Figure 2.17: Detail of the CAD output for one iteration of the glass ridge waveguide to free space coupler.

3.8. Predefined Mathematical Functions

3.8.1. Arithmetic Operators

The user-facing part of POEMS is implemented in REXX, so the arithmetic and logical operators and many of the simpler mathematical functions are native REXX constructs, and have REXX syntax and semantics.

+(addition)

-(subtraction)

*(multiplication)

/(division (real numbers))

//remainder (remainder has the same sign as the numerator)

% integer division

a.Differences from C/C++

C programmers should beware of a few things: the ’%’ operator, which in C and C++ is the modulus (remainder) operator, is used for ordinary integer division in REXX (and so in POEMS). Use the double-slash (’//’) operator for modulus.

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