Avoid_recursive_apex

public Class checkRecursive
{
  private static boolean run = true;
  public static boolean runOnce(){
    if(run){
      run=false;
      return true;
    }
    else
    {
      return run;
    }
  }
}

trigger updateTrigger on anyObject(after update) {

  if(checkRecursive.runOnce())
  {
    //write your code here            
  }
}