array_20arithmetic

**This is an old revision of the document!**

*by Richard Russell, March 2014*

**LB Booster** supports the ability to perform arithmetic operations on whole arrays, that is the operation is performed individually on every element of the array without you having to code a loop. For example you can add, subtract, multiply or divide arrays as follows:

a() = b() + c() a() = b() - c() a() = b() * c() a() = b() / c()

Note that the arrays must all be the same size. If each array has a maximum index value of 10 (the default) the first of the above examples is equivalent to (but will run much faster than) this code:

for i = 0 to 10 a(i) = b(i) + c(i) next i

You can also add, subtract, multiply or divide each element by a scalar numeric value as follows:

a() = b() + n a() = b() - n a() = b() * n a() = b() / n

The + (concatenation) operator can be used with string arrays:

a$() = b$() + c$() a$() = b$() + "!"

Finally, you can assign the same value to every element of an array in one operation:

a() = 4 * atn(1) a$() = "Hello world!"

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array_20arithmetic.1522502345.txt.gz · Last modified: 2018/03/31 13:19 by 127.0.0.1

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