how can we reverse a string using Bourne Shell scripting?

Asked by: Nehashri | Member Since Jan-2007 | Asked on: Feb 2nd, 2007

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angel421

Answered On : Sep 9th, 2011

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[~/temp]$ cat deepak.sh
#! /bin/sh

# reverse a string

[[ -z "$@" ]] && STR=" a b c d e f g h i j k l m n o p q r s t u v w x y z " || STR="$@"

len=${#STR}

REV=""
for (( i=$len ; i>0 ; i-- ))
do
REV=$REV""${STR:$i-1:$i}
STR=${STR%${STR:$i-1:$i}}
done

echo "Reversed string"
echo $REV

Code:
[~/temp]$ ./deepak.sh
Reversed string
z y x w v u t s r q p o n m l k j i h g f e d c b a

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how can we reverse a string using Bourne Shell scripting?

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