Early exit from function?
You can just use return
.
function myfunction() {
if(a == 'stop')
return;
}
This will send a return value of undefined
to whatever called the function.
var x = myfunction();
console.log( x ); // console shows undefined
Of course, you can specify a different return value. Whatever value is returned will be logged to the console using the above example.
return false;
return true;
return "some string";
return 12345;
Early exit from function in a forEach?
Another approach, with for
loop:
checkIfFollowed() {
for (let i = 0; i < this.currentUserInfos.followed.length; ++ i) {
if (18785 == 18785) {
console.log('its true');
this.alreadyFollowed = true;
return; // exit checkIfFollowed() here
}
}
this.alreadyFollowed = false;
console.log('the end');
return;
}
What is the best way to exit a function (which has no return value) in python before the function ends (e.g. a check fails)?
You could simply use
return
which does exactly the same as
return None
Your function will also return None
if execution reaches the end of the function body without hitting a return
statement. Returning nothing is the same as returning None
in Python.
How to break out or exit a method in Java?
Use the return
keyword to exit from a method.
public void someMethod() {
//... a bunch of code ...
if (someCondition()) {
return;
}
//... otherwise do the following...
}
From the Java Tutorial that I linked to above:
Any method declared void doesn't return a value. It does not need to contain a return statement, but it may do so. In such a case, a return statement can be used to branch out of a control flow block and exit the method and is simply used like this:
return;
How can I exit from a javascript function?
if ( condition ) {
return;
}
The return
exits the function returning undefined
.
The exit
statement doesn't exist in javascript.
The break
statement allows you to exit a loop, not a function. For example:
var i = 0;
while ( i < 10 ) {
i++;
if ( i === 5 ) {
break;
}
}
This also works with the for
and the switch
loops.
How do I exit from a function?
Use the return
statement.
MSDN Reference
How to exit a function in bash
Use:
return [n]
From help return
return: return [n]
Return from a shell function.
Causes a function or sourced script to exit with the return value
specified by N. If N is omitted, the return status is that of the
last command executed within the function or script.
Exit Status:
Returns N, or failure if the shell is not executing a function or script.
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