CASE

Starts a block of commands to execute if a variable has one of multiple values — or starts a multiple-choices decision structure itself

Implemented by: ansifull, bwbasic, bw32, QBasic, VBDOS, FreeBASIC, Gambas, EndBASIC

With variations:

Also written as:

Multiple CASEs are usually part of a SELECT-CASE branching structure. See the page for examples.

Modern versions of BBC BASIC replace the traditional SELECT-CASE structure with a SQL-like structure where the CASE keyword names the whole structure, such as the following example taken from //"An Introduction to Programming BBC BASIC"//:

CASE Choice% OF
  WHEN 1: PRINT "You chose option 1"
  WHEN 2: PRINT "You chose option 2"
  WHEN 3: PRINT "You chose option 3"
ENDCASE

• SELECT CASE
• ENDCASE
• WHEN
• OTHERWISE

• IF, THEN, ELSE

Tcl, C and C-derived languages such as JavaScript and Java provide the equivalent switch-case structure.