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# Something is wrong with %f

The computer keeps on telling me to insert %f in the right place... Here is my code. I literally put it in Xcode and it works perfectly.

float math_constants; math_constants = 2.71828;

printf("Euler's number = %f", math_constants);

arrays.c
```float math_constants;
math_constants = 2.71828;

printf("Euler's number = %f", math_constants);
``` PLUS

I don't know, based on the question you're asking, You should be on the last part of this 4-part challenge. However, the first line in your code is clearly incorrect, `math_constants` is NOT big enough to hold 2 numbers, it should've failed the part 1 of the code challenge; on top of that, the code from part 3 is missing here.

So I am really confused about what's going on here. Did you delete or modify some of the previous codes after you reach part 4?

Here's a sample solution for this problem should look like. And yes, your `printf` output is correct, only problem is that the lines before `printf` are causing the grader check to fail.

```float math_constants;
math_constants = 2.71828;
math_constants = 1.41421;
printf("Euler's number = %f", math_constants);
```