You can define a function and/or a procedure with the fun keyword followed by the name of the function. Functions can have return values and can receive arguments. They can also be called wherever in the code you need to call it.
Functions can return values to be used elsewhere. One example is a function that calculates the Einstein’s formula E=m.c² and returns its result to be stored in a variable. They can return a value by using the ret keyword followed by the value you want to return.
fun getEnergy(mass, lightSpeed) {
ret mass * math.pow(lightSpeed, 2);
}
You can also have procedures, where no value is returned. Using ret without a return value will simply jump out of the procedure.
fun alert(msg) {
ret;
}
To call a function anywhere in your code, you can use this syntax: function() or function(arg1, arg2, arg3, etc...) if it receives one or more parameters.
Functions can and will often receive parameters. A default value can also be defined by using the = assigning symbol. In the case of searchUser(email, id = "null"), if id is not passed to the function, it will automatically receive the string value “null”.
fun searchUser(email, id = "null") {
if email or not id == "null" {
const user = database.search(id, email);
ret user;
}
ret DEFAULT_USER;
}
searchUser(email);