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reading variables from other file

i have two shell script.
the nrec is declared once in first script as:
echo -e "Number of Recursion step\nThe default value is 30"
read nrec
And the second one is
#!/bin/bash
#This script manages the Results mostly by
#creating seperate files for each orbital
#from the main o/p ab.dat
for ((i=1; i<=9; i++))
do
cnt=`expr $i \* $nrec`
#echo "$cnt"
head -$cnt RESULT/ab.dat|tail -$nrec>RESULT/$i.dat
done

is there any way to pass the variable nrec of first script to the 2nd one without reading it once again??

If the second script is launched from the first, you can use export to make the variable available to all the processes launched from the first script, e.g.

Code:

#!/bin/bash

echo -e "Number of Recursion step\nThe default value is 30"

read nrec



export nrec=$nrec

/path/to/second_script.sh

in this case the second script inherits the variable nrec from the environment.

Instead, if the two scripts are launched separately, I think the only way is that the first script writes the value of nrec somewhere in a file and the second script waits for the file creation and then read the value of nrec (and eventually deletes the file).