Why are these numbers not equal?

Why are these numbers not equal?

r floating-point floating-accuracy r-faq

r

Numeric comparison difficulty in R

r floating-point comparison comparison-operators r-faq

r

What is the correct/standard way to check if difference is smaller than machine precision?

r floating-point rounding precision

r

Floating point math in different programming languages

python r haskell floating-point julia

r

For-loop vs while loop in R

r for-loop floating-point while-loop

r

Arithmetic with very small numbers in R

r floating-point

r

Floating point arithmetic and reproducibility

r floating-point ieee-754

r