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BSL:Introduction: Difference between revisions
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==Functions== | ==Functions== | ||
:''See [[BSL:Functions]] for details.'' | :''See [[BSL:Functions]] for details.'' | ||
Unlike C, functions do not need to be declared or defined before they are called. Functions are defined by starting with the keyword "func", then giving the type of data (see "Types" above) that the function returns, then the name of the function. After that, any parameters it receives should be listed within parentheses. Finally, the actual code for the function should be given within braces, like so: | Unlike C, functions do not need to be declared or defined before they are called. Functions are defined by starting with the keyword "func", then giving the type of data (see "Types" above) that the function returns, then the name of the function. After that, any parameters it receives should be listed within parentheses. Finally, the actual code for the function should be given within curly braces, like so: | ||
func int my_awesome_function(int some_input) | func int my_awesome_function(int some_input) | ||
{ | { | ||
var some_output = some_input + 5; | |||
return some_output; | |||
} | } | ||
Now that it is defined, we can call it from anywhere in the BSL for the same level by using this invocation: | Now that it is defined, we can call it from anywhere in the BSL for the same level by using this invocation: | ||
var result = my_awesome_function(counter); # sets "result" to the | var result = my_awesome_function(counter); # sets "result" to the the value of "counter" plus 5 | ||
Note that (1) we can set a variable to the result (see "Variables below) and then use that value elsewhere, and (2) the name of the variable we pass in to the function does not have any relation the name that the function uses for that value internally. That's because we might simply desire to pass a constant number to the function: | Note that (1) we can set a variable to the result (see "Variables below) and then use that value elsewhere, and (2) the name of the variable we pass in to the function does not have any relation the name that the function uses for that value internally. That's because we might simply desire to pass a constant number to the function: | ||