Question

Which of the following shows the header for a method that accepts a double value and returns a double?

public static void sqrt(double num)

public static double sqrt(25)

public static double sqrt(double 25)

public static double sqrt (double num)

I'm pretty positive that "public static double sqrt (double num)" is the correct answer but I don't know for sure.

Answer 1

@AlexandervonHumboldt2

Answer 2

@Directrix

Answer 3

@DanJS

Answer 4

@Godlovesme

Answer 5

sorry idk :( @Nnesha @sleepyjess @jim_thompson5910 help

Answer 6

lol

Answer 7

Java~ Such a wonderful thing to try and start and finish in a single week

Answer 8

ummmmm I have no idea what all that means... sowwy :(

Answer 9

idk about the "public static" part, but luckily that's in each answer choice

the format for a function/method header is

<return type> <function name>(<argument type>)

http://www.homeandlearn.co.uk/java/java_methods.html

Answer 10

hmm...

Answer 11

yea I knew that that's kinda why I went with the fourth answer. Does it seem like a reasonable answer to you @jim_thompson5910 ...?

Answer 12

yes the others are either missing key things or have 25 (which is a constant, not a variable) in them

Answer 13

It's always a little difficult for me to be 100% correct cause there aren't a ton of things online about constructing lines of code online. Most of the things are over the counter books that don't always have the best explanations

Answer 14

Would you mind looking over a few more questions?

Answer 15

A) public static void sqrt(double num)

is missing the return type of double

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B) public static double sqrt(25)

the input is 25, which is a constant, when it should be a variable

-------------------------------------------------------

C) public static double sqrt(double 25)

the input type is given, but it's still a constant

-------------------------------------------------------

D) public static double sqrt (double num)

both return type and argument type are given to be doubles

Answer 16

ok, just a few more, but no guarantees since I'm not really fluent in Java

Answer 17

That's alright :) I just want a second opinion. I'm not looking for indefinite answers.