Shortest code to create a string with specified lengh

Question

What is the shortest way to create a string with spaces and desired length in Objective-C?

I can do it using for cycle, but it's several lines of code.

Answer 1

Returns first six characters

NSString *fullName = @"Warif Akhand Rishi";
NSString *subString = [fullName substringToIndex:6];

Answer 2

Have you looked at stringWithFormat ?

[NSMutableString stringWithFormat:@"%20d", 42];