Executes the true-clausesequence of commands if the test- clause is true, or the false-clausesequence of commands if the test-clauseis false.
IF test-clause
THEN true-clause ELSE false-clause END Example
1XA : IF A==1
THEN MSGBOX "A EQUALS 1" :
ELSE MSGBOX "A IS NOT EQUAL TO 1" : END
Executes a series of test-clause commands that execute the appropriate true-clausesequence of commands. Its syntax is:
CASE
IF test-clause1THEN true-clause1END
IF test-clause2THEN true-clause2END
.
.
.
IF test-clausenTHEN true-clausenEND
END
When CASE is executed, test-clause1is evaluated. If the test is true, true-clause1is executed, and execution skips to END. If test-clause1if false, execution proceeds to test- clause2. Execution with the CASE structure continues until a true-clause is executed (or until all the test-clauses evaluate to false).
Many conditions are automatically recognized by the hp 39g+ as error conditions and are automatically treated as errors in programs.
IFERR...THEN...END allows a program to intercept error conditions that otherwise would cause the program to abort. Its syntax is:
IFERR trap-clause
THEN error-clause END
