Consider i execute a method 'Method1' in C#. Once the execution goes into the method i check few condition and if any of them is false, then the execution of Method1 should be stopped. how can i do this, i.e can the execution of a method when certain conditions are met.?
but my code is something like this,
int Method1() { switch(exp) { case 1: if(condition) //do the following. ** else //Stop executing the method.** break; case2: ... } } Use the return statement.
if(!condition1) return; if(!condition2) return; // body... 
if(!condition1 || !condition2) return;I think this is what you are looking for.
if( myCondition || !myOtherCondition ) return; Hope it answered your question.
If you want to exit the method due to an error you can throw an exception like this:
throw new Exception( "My error message" ); If you want to return with a value, you should return like before with the value you want:
return 0; If it is the Exception you need you can catch it with a try catch in the method calling your method, for instance:
void method1() { try { method2( 1 ); } catch( MyCustomException e ) { // put error handling here } } int method2( int val ) { if( val == 1 ) throw new MyCustomException( "my exception" ); return val; } MyCustomException inherits from the Exception class.
Are you talking about multi threading?
or something like
int method1(int inputvalue) { /* checking conditions */ if(inputvalue < 20) { //This moves the execution back to the calling function return 0; } if(inputvalue > 100) { //This 'throws' an error, which could stop execution in the calling function. throw new ArgumentOutOfRangeException(); } //otherwise, continue executing in method1 /* ... do stuff ... */ return returnValue; } There are a few ways to do that. You can use return or throw depending if you consider it an error or not.
You could setup a guard clause with a return statement:
public void Method1(){ bool isOK = false; if(!isOK) return; // <- guard clause // code here will not execute... } 