String Methods.

Second class. String methods return a new string — the original does not change unless you reassign.

trim() removes leading and trailing spaces. includes(sub) returns true/false whether the substring appears. slice(start, end) takes a segment: start included, end excluded.

Mini example:

const raw = " rent "; const clean = raw.trim(); console.log(clean.includes("rent")); console.log(clean.slice(0, 3));

Common mistake: expecting trim to change raw without assignment; or including end in the slice result. We do not use split/join yet.