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iOS Objective-C Basics (Retired) Fundamentals of C Variables

Sophie Phillips
Sophie Phillips
2,629 Points
Posted by Sophie Phillips
Sophie Phillips
2,629 Points

passing a string instead of a NSString to printf

I dont understand what is meant by this!

2 Answers

Stone Preston
Stone Preston
42,016 Points
Stone Preston
Stone Preston
42,016 Points

it means pass a string literal to printf as in

printf("This is a string literal with a format specifier %f for a float", someFloat);

the words between the " " are a string literal, not an NSString variable.

The challenge asks you to create a float with a value of 14, and then print it out so that the output reads "A ball with a radius of 14.5 inches". 

float radius = 14.5;

printf("A ball with a radius of %f inches", radius);

notice that the value of radius is inserted into the string where the format specifer (%f) is.