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    According to the ksh documentation you cannot count on the values examined here; it depends on the actual implementation on the system. (See my answer.) Commented Apr 9, 2015 at 8:07
  • @Janis Indeed, thanks. Answer updated to state this is implementation/configuration dependent. Commented Apr 9, 2015 at 9:06
  • @jlliagre suppose a string "ABCDEFGH" where each character is of 1 bytes then can i assume for ksh 93 and bash 4.2 array maximum capacity is 4194303 characters. Commented Apr 9, 2015 at 10:47
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    As I wrote, there is no hard-coded maximum capacity for bash. In any case, do you really need more than four millions element in a shell script array? Looks like you might be picking the wrong tool for the job. Commented Apr 9, 2015 at 10:59
  • @jlliagre I got the concept :) Commented Apr 9, 2015 at 12:47