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# Review: strings, concatenation, and formatting

**String**: a group of letters surrounded by single or double quotes. Strings can be **concatenated** together using |..| (two dots) operator. Strings can be **formatted** using |:format| method.

Examples: |"Hello!"|; |'abc'| .. |'def'|; print((|"I'm %d years old"|):|format|(|8|))
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