Time for an 2014 update…

Task/Determine-if-a-string-is-numeric/REXX/determine-if-a-string-is-numeric.rexx

@@ -2,30 +2,31 @@
 yyy=' -123.78'               /*or some such.*/
 
                              /*strings below are all numeric (REXX).*/
-zzz=' -123.78 '
+zzz='  -123.78 '
 zzz='-123.78'
 zzz='2'
 zzz="2"
 zzz=2
 zzz='000000000004'
 zzz='+5'
-zzz=' +6 '
-zzz=' + 7 '
-zzz=' - 8 '
-zzz=' - .9'
-zzz='- 19.'
+zzz='  +6  '
+zzz='  +  7  '
+zzz='  -  8  '
+zzz='  -  .9 '
+zzz='-  19.'
 zzz='.7'
 zzz='2e3'
 zzz=47e567
 zzz='2e-3'
 zzz='1.2e1'
-zzz=' .2E6'
-zzz=' 2.e5 '
-zzz='       +1.2E0002 '
-zzz='       +1.2e+002 '
-zzz=' +0000001.200e+002 '
-zzz=' - 000001.200e+002 '
-zzz=' - 000008.201e-00000000000000002 '
+zzz='  .2E6'
+zzz='  2.e5 '
+zzz='       +1.2E0002  '
+zzz='       +1.2e+002  '
+zzz=' +0000001.200e+002  '
+zzz='  -  000001.200e+002  '
+zzz='  -  000008.201e-00000000000000002  '
+ifx=i
 
 /*Note:  some REXX interpreters allow use of tab chars as blanks.  */
 
@@ -44,3 +45,4 @@ if  datatype(yyy)¬= 'NUM'   then say 'oops, not numeric:' yyy
 /*note: REXX only looks at the first char for DATATYPE's  2nd arg. */
 
 /*note: some REXX interpreters don't support the ¬ (not) character.*/
+/*note:   "    "       "         "      "    the /  as  negation.  */