change an if elif elif elif else by a case

vm-start.sh

@@ -63,8 +63,6 @@ INIT() {
     if [[ "$entry" =~ ^[yY]$ ]]
     then
         FORWARD=",hostfwd=tcp::10022-:22" # forward VM 22 port to Host 10022 
-    else
-        FORWARD=""
     fi
 
     mkdir -p conf
@@ -216,19 +214,20 @@ fi
 . "conf/$1-vm_var.sh"
 
 for (( i=3; i<=$#; i++)); do
-    if [ "${!i%=*}" == "nproc" ]
-    then
-        NPROC="${!i#*=}"
-    elif [ "${!i%=*}" == "memory" ]
-    then
-        MEMORY="${!i#*=}"
-    elif [ "${!i%=*}" == "uefi" ]
-    then
-        UEFI="set"
-        OPTION="$OPTION \
-            -drive if=pflash,format=raw,readonly=on,file=/usr/share/edk2/x64/OVMF_CODE.4m.fd \
-            -drive if=pflash,format=raw,file=${MAIN_LOCATION}/${LOCATION}/OVMF_VARS.4m.fd"
-    fi
+    case "${!i%=*}" in
+        "nproc")
+            NPROC="${!i#*=}"
+            ;;
+        "memory")
+            MEMORY="${!i#*=}"
+            ;;
+        "uefi")
+            UEFI="set"
+            OPTION="$OPTION \
+                -drive if=pflash,format=raw,readonly=on,file=/usr/share/edk2/x64/OVMF_CODE.4m.fd \
+                -drive if=pflash,format=raw,file=${MAIN_LOCATION}/${LOCATION}/OVMF_VARS.4m.fd"
+            ;;
+    esac
 done