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Function 'rnd'

     

This function is used to round a numeric value to a defined accuracy.

 

Syntax:

 

{INT_VAR|FLO_VAR}= rnd({NUM_EXPR}) or
{INT_VAR|FLO_VAR}= rnd({NUM_EXPR},{1|2|3|4|5|6})

 

I/O parameters:

{NUM_EXPR} Numeric expression to be rounded.
{1|2|3|4|5|6} Number of desired digits following the decimal point used for rounding the forwarded value (because the argument is a numeric expression, only the interger portion is accounted).
n (<=6) Number if digits following the decimal point. Rounding is performed to a float value with a defined accuracy.
-  
 

Return value:

 
{INT_VAR|FLO_VAR} Integer or float value containing the result of this function.
 

Example:

  Declaration of Variables
 
T Zei Cond/Curr R 01 R02 R03 ELSE
C 10 DT rounds the given number from one to three digits : : :  
B 10 DOCU_INT_1== 1 2 3  
    ------------------------------------------------------------------------ ------- ------- -------- ---------
A 10 put(rnd(23.2641758,1)) yes no no no
A 20 put(rnd(23.2641758,2)) no yes no no
A 30 put(rnd(23.2641758,3)) no no yes no
A 40 put("Please enter a number from 1 to 3!") no no no yes
  Result:
 

In this example the constant 23,2641758 was rounded to three digits behind the decimal point. If another number than the defaulted 1 to 3 digits is entered for the digits behind the decimal point, an error message is displayed.

In this example, the six-digit display is caused by using the command 'put'.

In order to prevent errors, the float/double type must be used if results can be expected to be either very large or very small (<2^-31 or > 2^31).

Functions and commands: Mathematics