Why does the addition of two float numbers is incorrect in C?

Question

I have a problem with the addition of two float numbers. Code below:

float a = 30000.0f;
float b = 4499722832.0f;

printf(\"%f\\n\", a+b);

Answer 1

Floating-point values cannot represent all integer values.

Remember that single-precision floating-point numbers only have 24 (or 23, depending on how you count) bits of precision (i.e. significant figures). So as values get larger, you begin to lose low-end precision, which is why the result of your calculation isn't quite "correct".