Concatenation, replication and comparison of strings (and why comparing strings with numbers using < fails)

Two arithmetic operators work on strings with new meanings. + concatenates: 'Py' + 'thon' is 'Python'. Both operands must be strings; 'Age: ' + 30 raises TypeError, so convert first with str(30) or use an f-string. * replicates: 'ab' * 3 is 'ababab', and the order can be swapped, 3 * 'ab'. The other operand must be an integer. Multiplying by 0 or a negative number gives the empty string rather than an error. The augmented forms += and *= work too and, because strings are immutable, they create new strings and rebind the name.