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Which idiom can be used to concatenate the strings 'a', 'b', 'c'?rustlet a = 'a'.to_string();let b = 'b'.to_string();let c = 'c'.to_string();

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Which idiom can be used to concatenate the strings 'a', 'b', 'c'?<br>rust<br>let a = 'a'.to_string();<br>let b = 'b'.to_string();<br>let c = 'c'.to_string();<br>






 
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