Selection: CASE

CASE OF picks one branch

• A CASE runs the branch whose value matches the variable.
• Branches are tested in order. The first match runs, and the rest are skipped.
• OTHERWISE is the branch for every other value. It comes last.

DECLARE Move : CHAR
Move ← 'W'
CASE OF Move
  'W' : OUTPUT "west"
  'E' : OUTPUT "east"
  OTHERWISE : OUTPUT "other"
ENDCASE

Watch out

• A character value uses single quotes: 'W'.
• Each branch is one statement here. A longer branch is easier to read as an IF.

Common mistakes

• Close the block with ENDCASE.
• Put a colon after the value, and after OTHERWISE.

Now you try

• Read a character and choose a word with CASE OF.