Rockwell-automation 1746-BAS BASIC LANGUAGE User Manual download pdf (Page 33)

Publication 1746-RM001A-US-P

Expressions and Operators 3-11

RND

Use the RND operator to return a pseudo-random number in the range between 0

and 1 inclusive. The RND operator uses a 16-bit binary seed and generates 65536

pseudo-random numbers before repeating the sequence. The numbers generated

are specifically between 0/65535 and 65535/65535 inclusive.

Logarithmic Operators

The module contains a complete set of logarithmic operators. These operators are

single-operand operators.

LOG([expr])

Use the LOG operator to return the natural logarithm of the argument. The

argument must be greater than 0. This calculation is carried out to 7 significant

digits.

If base 10 logs are needed, the following expression may be used:

log

(x)=log(x)/log(10)

The log is natural.

EXP([expr])

Use the EXP operator to raise the number e (2.7182818) to the power of the

argument.

IMPORTANT

Unlike most BASIC languages, the RND operator in the module

does not require an argument or a dummy argument. If an

argument is placed after the RND operator, a bad syntax error

occurs.

Example Result

>PRINT RND .26771954

Example Result

>PRINT LOG(12) 2.484906

>PRINT LOG(EXP(1)) 1

Example Result

>PRINT EXP(1) 2.7182818

>PRINT EXP(LOG(2)) 2

1 2 ... 28 29 30 31 32 33 34 35 36 37 38 ... 279 280

No comments

Rockwell-automation 1746-BAS BASIC LANGUAGE User Manual Page 33