square root of the argument
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It means end the function. Functions automatically end when execution reaches the end of the function, but you can return from a function at any point within the function with a return statement. If the function returns a value to its caller, you must provide a reachable return statement along with the value you wish to return.
Classes cannot return values, only functions can return values. But you cannot return a function from a function, you can only return a function pointer -- a pointer variable holding the address of the function you wish to return. All possible return values must be of the same type, therefore all function signatures and return types must be exactly the same -- only the name of the functions can differ.
No commands in C; the name of function sqrt is sqrt (include math.h; and use -lm at linkage)
The set of all values that a function will return as outputs is called the *range* of the function.
60*sqrt(C)+20 HRC