Shell Programming and Scripting

# ./justdoit
1) one
2) two
3) three
4) four
5) five
6) quit
Please input your choice..1

This is f1 function

1) one
2) two
3) three
4) four
5) five
6) quit
Please input your choice..

## justdoit ##
#!/bin/bash

f1 ()  {
echo -e "This is f1 function\n"
}

f2 ()  {
echo "This is f2 function"
}

f3 ()  {
echo "This is f3 function"
}

f4 ()  {
echo "This is f4 function"
}

f5 ()  {
echo "This is f5 function"
}

while [ "$i" != "6" ];   do
echo "1) one
2) two
3) three
4) four
5) five
6) quit"
read -p "Please input your choice.." i
echo ""

case $i in
   1) func=1 ;;
   2) func=2 ;;
   3) func=3 ;;
   4) func=4 ;;
   5) func=5 ;;
   6) break ;;
   *) printf 'Invalid selection please try again' ;;
  esac

for i in 1 2 3 4 5
 do
   if [ "$func" == "$i" ]; then
   f$i
   fi
 done

done

# ./justdoit
1) one
2) two
3) three
4) four
5) five
6) quit
Please input your choice..124

This is f1 function
This is f2 function
This is f4 function
1) one
2) two
3) three
4) four
5) five
6) quit

## justdoit ##
#!/bin/bash

f1 ()  {
echo "This is f1 function"
}

f2 ()  {
echo "This is f2 function"
}

f3 ()  {
echo "This is f3 function"
}

f4 ()  {
echo "This is f4 function"
}

f5 ()  {
echo "This is f5 function"
}

while [ "$i" != "6" ];   do
echo "1) one
2) two
3) three
4) four
5) five
6) quit"
read -p "Please input your choice.." i
echo ""

for x in $(echo `echo $i | fold -w1`)
 do
   f${x}
 done

done

   *) printf 'Invalid selection please try again \n' ;;

for i in $choice
do
  type f${i} &>/dev/null && f${i} || echo "f${i} not found. Parhaps invalid choice?. Try again."
done