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Here we are returning a char value out of a method that has a double return type, this works because - Data type double is larger than char, hence, double return type is large enough to hold a char value and return it from the method. your coworkers to find and share information.

I was asked a question in an interview to return 1 if provided 0 and return 0 if provided 1 without using conditions i.e if, ternary etcIf you are given only 0 and 1 then this could be simpler:This could use to switch between any value and 0, EG 3:We can use the xor operator here. This will not compile in (!value) returns boolean and you can convert that back to a number which is what Number function is doing herewithout using conditions i.e if, ternary etc.

At the moment one can assume either that return statement in your code is simply there to get your code to compile or that it's there to intentionally deal with the other inputs.ok i was banging my head on the wrong door .. this is a beautiful answer ..I think this is the better answer since XOR is logically equivalent to the inequality operator when operating on boolean values.This does not give the same answer as the original code for inputs other than 0 and 1.Hello Alexander, I surely did not down-vote it ..maybe somebody spammed it .Can you specify the language you are using.

And return -1 means nothing in java, you are just returning a int value, thats it. 97.0.

Private self-hosted questions and answers for your enterpriseProgramming and related technical career opportunitiesIf you're expected to return 0 on other input, you should explicitly say so (in fact, you should probably clarify even if 0 and 1 are the only valid input values). The new Oracle Technology Network License Agreement for Oracle Java SE is substantially different from prior Oracle Java licenses. Free 30 Day Trial considering inputs are only [1, 0] it is also possible to make method to return the 0 to the power of input.

We use cookies to ensure you have the best browsing experience on our website. By clicking “Post Your Answer”, you agree to our To subscribe to this RSS feed, copy and paste this URL into your RSS reader. There is no loss in the … The representation of 1 and 0 in bits is as follows:1 ^ 1 = (0000 0001) ^ (0000 0001) = 0000 0000 = 0 because since they share the same bits none of the bits are copied over.0 ^ 1 = (0000 0000) ^ (0000 0001) = 0000 0001 = 1 because the last bit is 1 in one of the operands but 0 in the other. The only meaningful explanation for returning -1 seems to be, that the code calling your function expects a return type of int, converted to int from passed String. Featured on Meta Important Oracle Java License Update The Oracle Java License has changed for releases starting April 16, 2019. If a Calculation uses any amount of double values, then the output will be a double value. By using our site, you acknowledge that you have read and understand our

return can be used with methods in two ways: Methods returning a value : For methods that define a return type, return statement must be immediately followed by return … The Overflow Blog double g = 1.0/3.0; System.out.printf("%gf", g); Use .0 while doing double calculations or else Java will assume you are using Integers. In the target field point it to the correct java 64 bit installations home path using the vm argument with the java_home path enclosed in quotes like so : D:\Scala_eclipse\eclipse.exe -vm "C:\Program Files\Java\jdk1.8.0_11" This almost always solves all my Eclipse (scala eclipse as well) related problems. Stack Overflow works best with JavaScript enabled Xor is "exclusive or" and returns a 0 when there are two or zero 1's and returns 1 if there's exactly one 1.

site design / logo © 2020 Stack Exchange Inc; user contributions licensed under Get hold of all the important DSA concepts with the It does this on every bit of the integer.So for example, the binary 1001 ^ 1000 = 0001 as the first bit has two 1's, so 0, the next two have no 1's, so zero, and the final bit only has one 1, outputting a 1.A different approach is based on the behaviour of integer division in ^ is the bitwise XOR operator which "copies the bit if it is set in one operand but not both". Don’t stop learning now. Assuming your language has something equivalent to The choice of value is done by triggering a Compile Error:I think the question is about calculate the bit-1 count.Using bitwise xor is probably the most computationally efficient way to do itThis relies on indexOf/IndexOf returning -1 if no match was found.it will return truthy or falsy value and converting it back into number, you will get 0 from 1 and 1 from 0.Thanks for contributing an answer to Stack Overflow! return is a reserved keyword in Java i.e, we can’t use it as an identifier.

return statement can be used at various places in the method but we need to ensure that it must be the last statement to get executed in a method.Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above.Attention reader! acknowledge that you have read and understood our If the are all Integers, then the output will be an Integer. Your solution uses ternary operators