Source: wikibot/proof-that-e-is-irrational
= Proof that e is irrational
{wiki=Proof_that_e_is_irrational}
The number \\( e \\), known as Euler's number and approximately equal to 2.71828, can be proven to be irrational using a proof by contradiction. Here’s the outline of the proof: \#\#\# Proof by Contradiction 1. **Assumption**: Assume \\( e \\) is rational.