Two arithmetic symbols also work on strings, with different meanings. The + operator concatenates (joins) two strings: "snow" + "ball" gives "snowball". The * operator replicates a string a whole number of times: "ab" * 3 gives "ababab". The order of the operands for * does not matter, so 3 * "ab" is the same. Multiplying by zero or a negative number gives an empty string "". Neither operator adds a space for you: "Hello" + "world" is "Helloworld".
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