Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

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

luciana abbruzzese
luciana abbruzzese
2,199 Points

problem task Objective C Basics

Hi, I´m stucked in this part and I don´t know what I´m doing wrong, could you help me please? Thanks!

arrays.c
float math_constants [ ] = { 30, 56};
math_constants [0] = 2.71828;
math_constants [1] = 1.41421;

printf("geek0 %f\n.", math_constants[0] );

2 Answers

Hi Luciana,

The problem is that the string you provided inside the printf statement does not produce the output that was required by the Challenge. After the code executes, you want the output to be Euler's number = 2.71828 :

float math_constants[2];
math_constants[0] = 2.71828;
math_constants[1] = 1.41421;

printf( "Euler's number = %f", math_constants[0] );
luciana abbruzzese
luciana abbruzzese
2,199 Points

Ohhh thanks! I have another quiestion when I should use only %f or %f\n.? Which is the difference between both? Thansk!