To find the greatest number in the array without max function

This might be helpful.

a!localVariables(
  local!listOfNumber: { 67, 80, 100, 102, 150 },
  a!forEach(
    items: local!listOfNumber,
    expression: a!localVariables(
      local!item: fv!item,
      local!updatedList: remove(local!listOfNumber, fv!index),
      if(
        count(
          wherecontains(
            true,
            a!forEach(
              items: local!updatedList,
              expression: local!item > fv!item
            )
          )
        ) = count(local!updatedList),
        fv!item,
        {}
      )
    )
  )
)

This might be helpful.

a!localVariables(
  local!listOfNumber: { 67, 80, 100, 102, 150 },
  a!forEach(
    items: local!listOfNumber,
    expression: a!localVariables(
      local!item: fv!item,
      local!updatedList: remove(local!listOfNumber, fv!index),
      if(
        count(
          wherecontains(
            true,
            a!forEach(
              items: local!updatedList,
              expression: local!item > fv!item
            )
          )
        ) = count(local!updatedList),
        fv!item,
        {}
      )
    )
  )
)