{"id":53,"date":"2024-09-25T03:45:04","date_gmt":"2024-09-25T02:45:04","guid":{"rendered":"http:\/\/monkey.ploogie.co.uk\/?page_id=53"},"modified":"2024-09-28T09:51:14","modified_gmt":"2024-09-28T08:51:14","slug":"switch","status":"publish","type":"page","link":"https:\/\/monkey.ploogie.co.uk\/index.php\/switch\/","title":{"rendered":"switch"},"content":{"rendered":"

Syntax<\/h2>\n
switch ( expression ) {\r\n    case a : { BLOCK }\r\n    . . .\r\n    case p ,q, r : { BLOCK }\r\n    case n: {BLOCK}\r\n    default: {BLOCK}\r\n}<\/pre>\n
Parameters<\/h2>\n
\n\n\n\n\n\n\n\n
\n
Parameter<\/div>\n<\/th>\n
\n
Definition<\/div>\n<\/th>\n<\/tr>\n<\/thead>\n
a,b, … p,q,r, … n<\/em><\/td>\nvalues indicating the value of the variable that will cause the corresponding BLOCK to be executed<\/td>\n<\/tr>\n
expression<\/em><\/td>\nPSL expression whose integer value specifies the PSL statement BLOCK that will be executed<\/td>\n<\/tr>\n
BLOCK<\/em><\/td>\none or more statements that are executed when the corresponding case<\/em> value equals variable<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
Description<\/h2>\n
The\u00a0switch<\/em> statement evaluates expression<\/em> and based on its integer value executes a specific BLOCK<\/em>. The\u00a0case<\/em> labels correspond to the values of expression<\/em> for which a specific BLOCK<\/em> is available. 

If the value of expression<\/em> falls outside the range of the values in the\u00a0case<\/em> labels, execution continues with the BLOCK<\/em> corresponding to the default<\/em> label. If no default <\/em>label exists, execution will continue with the first statement following the\u00a0switch<\/em> statement. 

The switch <\/em>statement is similar in form and function to the C switch<\/em> statement. 

The switch<\/code> statement executes in almost the same way as a long sequence of if<\/code> – then<\/code> – else<\/code> – if<\/code> statements. A case<\/code> or default<\/code> clause is effectively a run-time statement that specifies a comparison against the value of expression<\/em>:<\/p>\n