When does "0E604" = "0E953" ?

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1 total messages Started by Joe Denison Tue, 12 Mar 2013 18:19

#277

Author: Joe Denison
Date: Tue, 12 Mar 2013 18:19

26 lines
3222 bytes

Can anyone explain why the results of this REXX exec indicate that the contents of the variables "aaa" and "bbb" match, even though based on the output of the SAY instruction just prior to the comparison, they clearly "do not match"?  

I can fix it by specifying the strictly equal operator in the comparison (e.g., "=="), but I don't understand why the comparison seems to have incorrect results with just the "=".


EDIT       MY.REXX(DSINFOA) - 01.03                        Member DSINFOA saved 
Command ===> tso dsinfoa                                      Scroll ===> CSR  
****** ***************************** Top of Data ******************************
000001 /*REXX EXEC*/                                                           
000002 Address TSO                                                             
000003 bbb="5E604"                                                             
000004 aaa="0E953"                                                             
000005 IF LEFT(aaa,1)="0" then                                                 
000006   DO /*Replace 1st char of "bbb" with a "0"  */                         
000007   bbb="0"||RIGHT(bbb,LENGTH(bbb)-1)                                     
000008   END                                                                   
000009 say length(bbb) bbb length(aaa) aaa                                     
000010 IF aaa=bbb then say "These two items match:  aaa="aaa "bbb="bbb         
000011 ELSE say "They don't match, duh!!!"                                     
000012 EXIT                                                                    
****** **************************** Bottom of Data ****************************
                                                                               
                                                                               
5 0E604 5 0E953                                                                
These two items match:  aaa=0E953 bbb=0E604                                    
***

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