/Shell/Bash/Shell script for guess for magic number

Shell script for guess for magic number

echo -en "Please guess the magic number: "
read X
echo $X | grep "[^0-9]" > /dev/null 2>&1
if [ "$?" -eq "0" ]; then
  # If the grep found something other than 0-9
  # then it's not an integer.
  echo "Sorry, wanted a number"
else
  # The grep found only 0-9, so it's an integer. 
  # We can safely do a test on it.
  if [ "$X" -eq "7" ]; then
    echo "You entered the magic number!"
  fi
fi

Source: shellscript.sh

Similar codes

0 vote146 views1 answer
Bluetooth software for linux
Shell/Bash
1 vote133 views1 answer
Git command show current repo
Shell/Bash
19 votes132 views3 answers
Bash list environment variables
Shell/Bash
0 vote149 views1 answer
Pushed into the wrong repo
Shell/Bash
173 votes210 views6 answers
Install nodemon
Shell/Bash
1 vote180 views1 answer
Git stash apply specific index
Shell/Bash
11 votes146 views4 answers
Docker log tail
Shell/Bash
20 votes147 views5 answers
Yarn remove package
Shell/Bash
6 votes135 views2 answers
Install jenkins on ubuntu 20.04
Shell/Bash
1 vote148 views1 answer
How to prevent ubuntu from sleeping when lid is closed
Shell/Bash