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Late reply, but the reason this works is: ( +a + +b ) coerces each variable with a unary operator ( + ), to assure the addition of two integers and not the concatination of two strings. Then, the integer is being multiplied by the concat multiplier ( * k ) and converted back to a string ( + "" )
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Recursive Digit Sum
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Late reply, but the reason this works is: ( +a + +b ) coerces each variable with a unary operator ( + ), to assure the addition of two integers and not the concatination of two strings. Then, the integer is being multiplied by the concat multiplier ( * k ) and converted back to a string ( + "" )