shell-007: if elif else

#!/bin/bash

echo -n "Is it morning? please input yes or no: "
read yesorno

if  "$yesorno" = y*  
then 
    echo "Good morning"
elif [ "$yesorno" = "no" ] || [ "$yesorno" = "NO" ]
 then 
    echo "Good afternoon"
else
    echo "wrong input"
fi

exit 0

2. 

#!/bin/bash

rm -f myFile.txt

if [ -f myFile.txt ]; then 
    :
else 
    echo "myFile.txt does not exist!"
fi

exit 0