121.74.237.41 at 05:52, 16 April 2015

2015-04-16T05:52:18Z

Lerc: Created page with "You can use if statements to optionally run a piece of code. The if statement takes the form if (condition) { actions; } if (true) { print("this text will al..."

2014-06-19T20:53:34Z

Created page with "You can use if statements to optionally run a piece of code. The if statement takes the form if (condition) { actions; } <edcode> if (true) { print("this text will al..."

New page

You can use if statements to optionally run a piece of code.

The if statement takes the form

if (condition) {
actions;
}

<edcode>
if (true) {
print("this text will allways appear")
}

if (false) {
print("this line won't ever get run");
}

if (5<10) {
print("five is less than ten")
}

if (20<10) {
print("twenty is less than ten")
}
</edcode>

You can optionally provide code to be run when the condition is not true with else.

if (condition) {
things to do when the condition is true
} else {
otherwise do the things here
}
<edcode>
function update() {
clear();
var m=getMousePosition();
if (m.x < 320) {
print ("the mouse pointer is on the left");
} else {
print ("the mouse pointer is on the right");
}
}

run(update)
</edcode>

In the example Below, the circle is filled when the mouse pointer is inside it.
<edcode>
var circle={x:250, y:300, size: 100};

function update() {
clear();
var m = getMousePosition();
print(m);
if ( distance(m,circle) < (circle.size/2) ) {
fillCircle(circle.x,circle.y,circle.size);
} else {
drawCircle(circle.x,circle.y,circle.size);
}

setColour("red");
drawLine(circle.x,circle.y,m.x,m.y);
}

run(update)
</edcode>

@@ Line 9: / Line 9: @@
 <edcode>
 if (true) {
-   print("this text will allways appear")
+   print("this text will always appear");
+}
@@ Line 17: / Line 17: @@
 if (5<10) {
-     print("five is less than ten")
+     print("five is less than ten");
+}
 if (20<10) {
-     print("twenty is less than ten")
+     print("twenty is less than ten");
+}
 </edcode>
@@ Line 43: / Line 43: @@
+}
-run(update)
+run(update);
 </edcode>
@@ Line 65: / Line 65: @@
+}
-run(update)
+run(update);
 </edcode>

If statements - Revision history

121.74.237.41 at 05:52, 16 April 2015

Lerc: Created page with "You can use if statements to optionally run a piece of code. The if statement takes the form if (condition) { actions; } if (true) { print("this text will al..."