String register

I have a string register "ARTICLE123.DT"

How can i remove ".DT" from the register in a program?

if it only 1234.DT its easy. But when there is letters that dosent work. Is karel the only option?

Only numbers:

R1=[SR10]

[SR10]=R1

Quote from PnsStarter

Hi Lintan,

Where does the string come from? From a PC or from a PLC?
If this string or several strings have a similar structure, and are only inside your robot, you can assemble them yourself:

CALL SET_SR(2,'ARTICLE')

CALL SET_SR(3,1234)

CALL SET_SR(4,'.DT')

SR[1] = SR[2] + SR[3] + SR[4]

PROG SET_SR

SR[AR[1]]=AR[2]

Then it's quite easy to do something with a sub string...

Best

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The .DT file come from a foler on FR:/folder/ which contains saved Registry data.

I have a keral program that saves Register data to a file and the files name is for example articel.dt

i can load the data with a karel program to, but if i choose the file from a list in the HMI the .DT comes in the SR and then i cant load the program whit the karel program.

I only want this because the list from the HMI can work then.

I can manualy write the articelnumber and load.

It would be great with a Karel program that only deletes the .DT

Quote from EnergyAddict

Two methods, based on PnsStarter's answer:

Method 1:

Assumes you're string always ends ".dt"

Code

   :  R[z]=STRLEN SR[x] ;
   :  R[z]=R[z]-3    ;
   :  SR[y]=SUBSTR SR[x],1,R[z] ;

Method 2:

Set SR[s] = "."

Code

   :  R[z]=FINDSTR SR[x],SR[s] ;
   :  R[z]=R[z]-1    ;
   :  SR[y]=SUBSTR SR[x],1,R[z] ;

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Thank you, that worked