Shell Programming and Scripting

read rSelection
if [[ $rSelection == '1' ]] then
    #call function 1
    else
    if [[ $rSelection == '2' ]] then
    #call function 2
    else
    if [[ $rSelection == '3' ]] then
    #call function 3
    else
    if [[ $rSelection == '4' ]] then
    #call function 4
    else
    if [[ $rSelection == '5' ]] then
    #call function 5
    else
    echo "Exiting"
    exit
    fi
fi

f1 () { 
echo running fn1 
}
 
f2 () {
echo running fn2 
}
 
f3 () { 
echo running fn3 
}
 
f4 () { 
echo running fn4 
}
 
echo "enter choice -- multiple choice can be provided separated by space"
 
read choice
 
set -- $choice
 
for i in $@
do
 echo "run function $i"
 f${i}
done

for i in $rSelection  (if there were a blank between the values) # but you could use while...
do
   <Your if paragraph
    fi >
done

for i in $choice
do
 echo "run function $i"
 f${i}
done

# ./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