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cat >temp
govind govindgovind govind

cat temp|sed 's/govind/-/g'|tr ('s/govind/@-/g'|tr) -d "\n"|wc -c
4

Please use tags where appropriate, thank you

$0 ---->represent program name
so when u write $0 in script it will always give your program name.
But when u write echo $0 on prompt it will give SHELL name which is also a program

instead of while loop use for loop
it will slove th problem...