- Basic Objective-C
- Objective-C - Home
- Objective-C - Overview
- Objective-C - Environment Setup
- Objective-C - Program Structure
- Objective-C - Basic Syntax
- Objective-C - Data Types
- Objective-C - Variables
- Objective-C - Constants
- Objective-C - Operators
- Objective-C - Loops
- Objective-C - Decision Making
- Objective-C - Functions
- Objective-C - Blocks
- Objective-C - Numbers
- Objective-C - Arrays
- Objective-C - Pointers
- Objective-C - Strings
- Objective-C - Structures
- Objective-C - Preprocessors
- Objective-C - Typedef
- Objective-C - Type Casting
- Objective-C - Log Handling
- Objective-C - Error Handling
- Command-Line Arguments
- Advanced Objective-C
- Objective-C - Classes & Objects
- Objective-C - Inheritance
- Objective-C - Polymorphism
- Objective-C - Data Encapsulation
- Objective-C - Categories
- Objective-C - Posing
- Objective-C - Extensions
- Objective-C - Protocols
- Objective-C - Dynamic Binding
- Objective-C - Composite Objects
- Obj-C - Foundation Framework
- Objective-C - Fast Enumeration
- Obj-C - Memory Management
- Objective-C Useful Resources
- Objective-C - Quick Guide
- Objective-C - Useful Resources
- Objective-C - Discussion
Objective-C - if statement
An if statement consists of a boolean expression followed by one or more statements.
Syntax
The syntax of an if statement in Objective-C programming language is −
if(boolean_expression) { /* statement(s) will execute if the boolean expression is true */ }
If the boolean expression evaluates to true, then the block of code inside the if statement will be executed. If boolean expression evaluates to false, then the first set of code after the end of the if statement (after the closing curly brace) will be executed.
Objective-C programming language assumes any non-zero and non-null values as true, and if it is either zero or null, then it is assumed as false value.
Flow Diagram
Example
#import <Foundation/Foundation.h> int main () { /* local variable definition */ int a = 10; /* check the boolean condition using if statement */ if( a < 20 ) { /* if condition is true then print the following */ NSLog(@"a is less than 20\n" ); } NSLog(@"value of a is : %d\n", a); return 0; }
When the above code is compiled and executed, it produces the following result −
2013-09-07 22:07:00.845 demo[13573] a is less than 20 2013-09-07 22:07:00.845 demo[13573] value of a is : 10
objective_c_decision_making.htm
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