How to do Camel Casing in Appian any function Available?

Is the sample input for this - "Text Should Be In Camel Case"?

Yes 

Did you try anything? There a plenty of text functions that should help you to implement your own custom expression rule?

stripwith(proper("Text Should Be In Camel Case"), " ")

This example ^ needs further adjustment to make the first letter lower case:

a!localVariables(
  local!text: "Text shOUld be in camel Case",
  local!proper: stripwith(proper(local!text), " "),
  concat(
    lower(left(local!proper,1)),
    right(local!proper,len(local!proper)-1)
  )
)

(It won't let me Quote the post when there is only a code snippet and no other text apparently..)

This example ^ needs further adjustment to make the first letter lower case:

a!localVariables(
  local!text: "Text shOUld be in camel Case",
  local!proper: stripwith(proper(local!text), " "),
  concat(
    lower(left(local!proper,1)),
    right(local!proper,len(local!proper)-1)
  )
)

(It won't let me Quote the post when there is only a code snippet and no other text apparently..)

I dunno, I find the a!forEach() solution a bit more graceful than force-swapping the left-most single character

I am a big a!forEach() fan, but just working on my brownie points with Stefan for using non-looping solutions