BCL Programmers Manual V2.00 (PDF) - Barix

Read more about types and variables in sections 11 and 14.3.2.2 Procedures and functionsBuilt-in BCL procedures are called by the procedure name optionally followed by commaseparatedprocedure parameters. E.g.:WRITE 1,a$,10Procedures do not return any value.Built-in functions as well as user defined functions are called by their name, followed by theopening bracket '(' (ASCII 0x28), an optional comma-separated list of function parametersand closed by the closing bracket ')' (ASCII 0x29).Functions always return a value (a string or an integer) and therefore can be called in anexpression. Functions can be called as a statement, in which case the return value isdiscarded.Examples:l=LEN("Hello world!")a$="Total sum is "+STR$(a)my_function()' function call in an assignment' function call in an expression' user function called as a statementRead more about user defined functions in chapter , more about integer functions in chapter4 and more about string functions in chapter 5.6.3.2.3 Conditional statementsConditional program execution is achieved by using IF-THEN-ELSE construct. For example:IF a100 THENSYSLOG "String too large"GOSUB 2000ENDIFRead more about conditional statements in chapter 6.53.2.4 Program flow controlProgram flow can be controlled by the following statements: GOTO, GOSUB-RETURN, FOR-NEXT.GOTO is an unconditional jump to a specific label. Label is a unique numeric mark in theprogram .Example:10SYSLOG "Current time is "+SPRINTF$("%1t",0)DELAY 1000GOTO 10Barix AG | 9/106