• Exercise 2: Write a script that print all even number from n1 to n2, n1 and 2 are provided by user. (while loop)

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Exercise 1: Please run the example code from
previous pages.
Exercise 2: Write a script that print all even number
from n1 to n2, n1 and 2 are provided by user. (while
loop)
Exercise 3: Write a menu script that has 3 option,
option 1: list all file current directory, option 2:
create a file call hello.py, option 3: exit.
Transcribed Image Text:Exercise 1: Please run the example code from previous pages. Exercise 2: Write a script that print all even number from n1 to n2, n1 and 2 are provided by user. (while loop) Exercise 3: Write a menu script that has 3 option, option 1: list all file current directory, option 2: create a file call hello.py, option 3: exit.
# ! /bin/bash
press_enter()
{
echo -en "\nPress Enter to continue"
read
clear
selection=
until [ "$selection" = "0" ]; do
echo
PROGRAM MENU
1 - display free disk space
2 - display free memory
0 - exit program
%3D
echo -n "Enter selection: "
read selection
echo
case $selection in
1 ) df ; press_enter ;;
2 ) free ; press_enter ;;
0 ) exit ;;
* ) echo "Please enter 1, 2, or 0"; press_enter
esac
done
Transcribed Image Text:# ! /bin/bash press_enter() { echo -en "\nPress Enter to continue" read clear selection= until [ "$selection" = "0" ]; do echo PROGRAM MENU 1 - display free disk space 2 - display free memory 0 - exit program %3D echo -n "Enter selection: " read selection echo case $selection in 1 ) df ; press_enter ;; 2 ) free ; press_enter ;; 0 ) exit ;; * ) echo "Please enter 1, 2, or 0"; press_enter esac done
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