Hi you can simply net them:
:SET &COLOR#= "green"
:SET &FRUIT# = "kiwi"
! green kiwi, cucumber
! yellow banana, lemon
!
:PRINT "IF Example ================="
:IF &COLOR# = "green"
: PRINT "color is green!"
: IF &FRUIT# = "kiwi"
: PRINT "fruit is kiwi!"
: ELSE
: PRINT "fruit is not kiwi!"
: ENDIF
:ELSE
: PRINT "color is not green!"
: IF &FRUIT# = "banana"
: PRINT "fruit is kiwi!"
: ELSE
: PRINT "fruit is not banana!"
: ENDIF
:ENDIF
:PRINT ""
!
! =======
:PRINT "SWITCH Example ================="
!
:SWITCH &COLOR#
: CASE "green"
: PRINT "Color: green"
: SWITCH &FRUIT#
: CASE "kiwi"
: PRINT "Fruit: kiwi"
: CASE "cucumber"
: PRINT "Fruit: cucumber"
: OTHER
: PRINT "other fruit than kiwi or cucumber"
: ENDSWITCH
: CASE "yellow"
: PRINT "Color: yellow"
: SWITCH &FRUIT#
: CASE "banana"
: PRINT "Fruit: banana"
: CASE "lemon"
: PRINT "Fruit: lemon"
: OTHER
: PRINT "other fruit than banana or lemon"
: ENDSWITCH
: OTHER
: PRINT "other color than green or yellow"
:ENDSWITCH
2019-04-17 11:12:55 - U00020408 IF Example =================
2019-04-17 11:12:55 - U00020408 color is green!
2019-04-17 11:12:55 - U00020408 fruit is kiwi!
2019-04-17 11:12:55 - U00020408
2019-04-17 11:12:55 - U00020408 SWITCH Example =================
2019-04-17 11:12:55 - U00020408 Color: green
2019-04-17 11:12:55 - U00020408 Fruit: kiwi
cheers, Wolfgang