'If-Else' Statement

General Form

Condition is expression that must result in true/false. Code block can be any code.

if (YOUR-CONDITION) {
	//your-code-for-true-result
}
else {
		//your-code-for-false-result
}

Condition True

Here we hard-code the condition to true, so we print true!

if (true) {
	prn("true!");
}
else {
	prn("false!");

Condition False

Here we hard-code the condition to false, so we print false!

if (false) {
	prn("true!");
}
else {
	prn("false!");

Using Vars

We'll often use variable(s) in the condition like we do here

public void play(boolean isFun) {
	if (isFun) {
		prn("Yes fun");
	}
	else {
		prn("Not so fun");
	}
}

Using Logical Expression

Here we use a logical expression (evaluates to true/false)

public void logicPlay() {
	int a=10, b=15;
	//If a < b, print
	if (a < b) {
		prn("a is smaller");
	}
	else {
		prn("a is equal or greater");
	}
}

Using Logical Operator

Java uses && and || for logical AND and OR

public void logicPlay() {
	int a=502, b=205;
	//if a > 500 AND b < 300
	if ((a > 500) && (b > 300)) {
		prn("Both conditions true");
	}
	else {
		prn("Both conditions NOT true");
	}
}

With Proper Objects

We'll often use proper objects in both the condition and the code block

public void drawSquare(Rectangle rec,  Graphics g, Color c) {
	//If rec is a square, ask it to draw
	if (rec.isSquare()) {
		rec.draw(g, c);
	}
	else {
		prn("Did not draw: " + rec.toString());
	}
}