Objective-C Decision Making




Decision making statements in Objective-C


Objective-C programming language provides following types of decision making statements. Click the following links to check their details:

if statementAn if statement consists of a boolean expression followed by one or more statements.
if...else statementAn if statement can be followed by an optional else statement, which executes when the boolean expression is false.
nested if statementsYou can use one if or else if statement inside another if or else if statement(s).
switch statementA switch statement allows a variable to be tested for equality against a list of values.
nested switch statementsYou can use one switch statement inside another switch statement(s).

The ? : Operator:

We have covered conditional operator ? : in previous chapter which can be used to replace if...else statements. It has the following general form:

Exp1 ? Exp2 : Exp3;

Where Exp1, Exp2, and Exp3 are expressions. Notice the use and placement of the colon.

The value of a ? expression is determined like this: Exp1 is evaluated. If it is true, then Exp2 is evaluated and becomes the value of the entire ? expression. If Exp1 is false, then Exp3 is evaluated and its value becomes the value of the expression.