Ruby Case Statement Return Value

All the expressions described here return a value.

Ruby case statement return value.

This returned value will be the value of the last statement. Nil and false are false values. Result case value when match1 then result1 when match2 then result2 when match3 then result3 when match4 then result4. Hash indexes keys returns a new array consisting of values for the given key s.

Hash has value value tests whether hash contains the given value. A case statement will always return a single object just like a method call. With an if statement you can check if something is true. Notice that we use two equal symbols to mean equality.

A much easier way to handle such situations is to use the ruby case statement the syntax for which is defined as follows. This method is deprecated. Ruby case ranges. For example the above version of the case statement ca be re written like this.

The return statement in ruby is used to return one or more values. Let s see an example where we want to print some message depending on what range a value falls in. For the tests in these control expressions. Case capacity when 0 you ran out of gas.

One equals sign in ruby means assignment make sure to use when you want to find out if two things are the same. The statement for i in 0 5 will allow i to take values in the range from 0 to 5 including 5. Hash index value returns the key for the given value in hash nil if no matching value is found. Every method in ruby returns a value by default.

1 value is set 3 value is set ruby case statement syntax case expression when expression expression then code. This will produce the following result. So you can safely wrap a case statement in a method call and ruby will have no problems with it. Usr bin ruby for i in 0 5 puts value of local variable is i end here we have defined the range 0 5.

Things are no different when it comes to case statements. If you don t this right you won t get the expected results. This can quickly become cumbersome however when a need arises to evaluate a large number of conditions. The case statement is more flexible than it might appear at first sight.

True and any other object are true values. Else code end compares the expression specified by case and that specified by when using the operator and executes the code of the when clause that matches. Return values from methods. For example def test i 100 j 10 k 0 end this method when called will return the last declared variable k.