Arithmetic on rustbiteshttps://www.rustbites.com/tags/arithmetic/Recent content in Arithmetic on rustbitesHugoenWed, 15 Apr 2026 10:32:54 +020081. checked_sub_signed — Subtract a Signed Delta From an Unsigned Without Castshttps://www.rustbites.com/posts/bite-081/Tue, 14 Apr 2026 17:00:00 +0100https://www.rustbites.com/posts/bite-081/<p><code>checked_add_signed</code> has been around for years. Its missing sibling finally landed: as of Rust 1.91, <code>u64::checked_sub_signed</code> (and the whole <code>{checked, overflowing, saturating, wrapping}_sub_signed</code> family) lets you subtract an <code>i64</code> from a <code>u64</code> without casting, unsafe, or hand-rolled overflow checks.</p>