String properties in iOS (Objective C)

• Length
• UTF8String
• Capitalised a String
• Uppercase 
• Lowercase
• Double Value
• Float Value
• Integer Value
• Bool Value

#import <Foundation/Foundation.h>

int main(int argc, const char * argv[]) {

    @autoreleasepool {

        NSString *str=[[NSString alloc]init];

        str=@ "Akshay sarda";

        NSLog(@ "%@",str);

        

        char *arr="Akshay";

        NSString *temp=[[NSString alloc]initWithCString:arr encoding:NSUTF8StringEncoding];

        NSString *a=[[NSString alloc]initWithUTF8String:arr];

        NSLog(@ "%@ %@",a,temp);

        

        int count;

        NSString *arr1=[[NSString alloc]initWithFormat:@ "Count is %d",count];

        NSLog(@ "%@",arr1);

        

        //String Length

        NSLog(@ "Length is %lu",str.length);

        NSLog(@ "Length is %lu",a.length);

        

        //UTF8String

        NSLog(@ "String is %s",temp.UTF8String);

        

        //Capitalized a String

        NSLog(@ "%@",str.capitalizedString); //It will Capitalized the First letter of each word.

        

        //Lower case String

        NSLog(@ "%@",a.lowercaseString);

        

        //Upper case String

        NSLog(@ "%@",str.uppercaseString); //It will convert the complete string in Capital Letter.

        

        //Double Value

        NSString *pi=@ "3.14";

        NSLog(@ "%f",pi.doubleValue);

        

        //Float Value

        NSLog(@ "%f",pi.floatValue);

        

        //Integer Value

        NSLog(@ "%lu",pi.integerValue);

        

        //BOOL Value

        BOOL k=YES;

        NSLog(@ "%d",k);

    }

    return 0;

}