hello , my first question is i) i have made a new script in this script i have a variable called found , in this script i call a subscript and i want that this subscript change the value of my variable if needed, i tried to export it but without effort do anyone have an idea ii)again i am calling the same script with some argument in the script i want to store the number of arguments in a variable called number , how can i do this

well i have tried to solve the following number= $* | wc -w but it has give error how to do it help people

i) I'm not sure from your description, but I think you are trying to capture the output of another shell script. You normally use command substitution to capture the output of a command. Assume your shell script named subscript is in the same directory and contains this one line: echo "helloworld" Now, in your main script, using korn or bash shell, execute subscript within $(): #!/bin/bash found=$(./subscript) echo "$found" # should be helloworld # the older bourne shell uses backtics for command substitution: found=`./subscript` echo "$found" ii) the $# variable contains the number command line arguments echo "number of args: $#"

hi nails i am very proud of your answers but i think i asked the question in a wrong manner, for the first question i am writing a sort algorithm i get each line of the text one by one and i send the line as argument to the subscript , and i have a variable called found in the main script, the subscripts checks whethe a keyword matches with any word in the line which is send as an argument to the subscript, i want, if there is a match between a word in the line and the keyword, found to increase one, if no match then it will stay unchanged, and the end when all lines checked , i want found to contain number of matches, so while i tried the found has not changed when i use export option it makes the variable read only, so that is the first question ii) the second one i hope i solved i just want the output of the echo which is a number in my case i.e. i make echo $x + $y (or any expression) to be stored in a variable called $number so that i can make arithmetical operations on it, for this purpose i found that number= ' echo ls | wc -w ' i tried it worked it assigns the output of the wc command to the variable number, if anyone knows any shortcut method better than i would like to know

use the backtick ( under the tilde key ) instead of single quotes. number=`ls | wc -w`

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