php - Why this code giving output 200? -

-

solve problem please... 

function abc($a, $b) {      echo  $c = $a+$b; }  echo   0*( abc(10,10)  ); // giving output 200!!!!! echo "<br />"; echo   6*( abc(10,10)  ); //giving output 200!!!!!  echo "<br />"; echo   30*( abc(10,10)  ); //giving output 200!!!!!

any 1 in this?

what echo 0 * (echo (10 + 10)). precedence of parenthesis, first echo 10 + 10 (= 20), echo 0 * (void) , seems void implicitly cast int(0), void return of function abc, output 200.

6 * void , 30 * void = 0 either, output same.

edit: is, step step, happens: echo 0 * (abc(10 + 10)):

1) calls abc

2) echoing 10 + 10 (so outputs 20 @ moment.)

3) returning abc (it returns void because don't specify return value)

4) evaluates 0 * (abc(10 + 10)) = 0 * void = 0 * 0 = 0

5) echoing 0 (so ouputs 0 right after 20 step 2) ).

the steps second , third lines same, since 6 * 0 , 30 * 0 equals 0 too.


Comments

Post a Comment

Popular posts from this blog

Hatching array of circles in AutoCAD using c# -

-
i beginner in autocad plugins .i have created array of circle using following code. now, have hatch circles in array .how that??how hatch circles @ once? moreover, how can return hatch method , use hatch objects.sorry language.thanks in advance. [assembly: commandclass(typeof(beamsection.class1))] namespace beamsection { public class class1 { //class1 obj = new class1(); [commandmethod("beamatsupport")] public void addlightweightpolyline() { // current document , database document acdoc = application.documentmanager.mdiactivedocument; database accurdb = acdoc.database; promptpointresult ppr = acdoc.editor.getpoint("\nselect starting point "); var ucs = acdoc.editor.currentusercoordinatesystem; point3d startingpt = ppr.value.transformby(ucs); list<double> radius = new list<double>(); radius.add(0.5); ...
Read more

ios - UITEXTFIELD InputView Uipicker not working in swift -

-
hello trying pop uipickerview view programmatically when user clicks on textfield. have tried doesn't doing anything. isn't working. nothing happening when click textfield class userprofiletableviewcontroller: uitableviewcontroller,uitextfielddelegate,uipickerviewdelegate,uipickerviewdatasource { var itempicker: uipickerview! = uipickerview() @iboutlet weak var gendertxtfield: uitextfield! var gender = ["male","female"] override func viewdidload() { super.viewdidload() gendertxtfield.delegate = self itempicker!.delegate = self itempicker!.datasource = self itempicker!.backgroundcolor = uicolor.blackcolor() self.gendertxtfield.inputview = itempicker } func numberofcomponentsinpickerview(pickerview: uipickerview) -> int{ return 1 } // returns # of rows in each component.. func pickerview(pickerview: uipickerview, numberofrowsincomponent component:...
Read more