/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 vote273 views1 answer
Yarn install uuid
Shell/Bash
1 vote254 views1 answer
Chmod files 644 directories 755
Shell/Bash
0 vote294 views1 answer
Vue search npm
Shell/Bash
0 vote279 views1 answer
Git ignore folder except one file
Shell/Bash
17 votes289 views6 answers
Pip upgrade all packages
Shell/Bash
13 votes341 views3 answers
How to get rid of local git repository
Shell/Bash
0 vote282 views1 answer
Error: Account is not an upgradeable program or already in use
Shell/Bash
0 vote225 views1 answer
Tail exclude last line
Shell/Bash
0 vote270 views2 answers
Read motd ubuntu
Shell/Bash
2 votes279 views3 answers
Mui install
Shell/Bash