Ruby Case Statement Return Value

Hash index value returns the key for the given value in hash nil if no matching value is found.

Ruby case statement return value.

This can quickly become cumbersome however when a need arises to evaluate a large number of conditions. This will produce the following result. For example def test i 100 j 10 k 0 end this method when called will return the last declared variable k. Case capacity when 0 you ran out of gas.

Every method in ruby returns a value by default. Will insert the default value for keys that are not found. So you can safely wrap a case statement in a method call and ruby will have no problems with it. For example the above version of the case statement ca be re written like this.

One equals sign in ruby means assignment make sure to use when you want to find out if two things are the same. This returned value will be the value of the last statement. 1 value is set 3 value is set ruby case statement syntax case expression when expression expression then code. This method is deprecated.

The return statement in ruby is used to return one or more values. A much easier way to handle such situations is to use the ruby case statement the syntax for which is defined as follows. If you don t this right you won t get the expected results. Result case value when match1 then result1 when match2 then result2 when match3 then result3 when match4 then result4.

A case statement will always return a single object just like a method call. Usr bin ruby for i in 0 5 puts value of local variable is i end here we have defined the range 0 5. 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. Here we have explained if expression ternary if unless expression modifier if and unless and case expression.

Hash has value value tests whether hash contains the given value. Let s see an example where we want to print some message depending on what range a value falls in. True and any other object are true values. Ruby case ranges.

But when you want to check for the opposite not true false. Return values from methods. Things are no different when it comes to case statements. Nil and false are false values.

For the tests in these control expressions. Notice that we use two equal symbols to mean equality. The statement for i in 0 5 will allow i to take values in the range from 0 to 5 including 5. All the expressions described here return a value.