How to define private methods in Objective C ?

Ok, I was checking my backlog emails and I found out an interesting question asked by a user:

How to define private methods in Objective C ?

Now different people do it differently, but one the most popular and easiest route is following:
You have a class MyClass, So you want to define a private method say updateText:(NSString *)value,
Here is how you do it.

#import "MyClass.h"

@interface MyClass() 
-(void)updateText:(NSString *)value;
@end

@implementation MyClass

.
.
-(void)someMethod
{

    [self updateText:@"Reetu"];
}
.

.

.
-(void)updateText:(NSString *)value
{
     myLabel.text=value;
} 

. 
.

@end