Ruby Case Statement Return Value

This method is deprecated.

Ruby case statement return value.

But when you want to check for the opposite not true false. Every method in ruby returns a value by default. Here we have explained if expression ternary if unless expression modifier if and unless and case expression. Things are no different when it comes to case statements.

Usr bin ruby for i in 0 5 puts value of local variable is i end here we have defined the range 0 5. Hash index value returns the key for the given value in hash nil if no matching value is found. True and any other object are true values. Hash indexes keys returns a new array consisting of values for the given key s.

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. Ruby case ranges. 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.

1 value is set 3 value is set ruby case statement syntax case expression when expression expression then code. The return statement in ruby is used to return one or more values. Return values from methods. With an if statement you can check if something is true.

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. A case statement will always return a single object just like a method call. This can quickly become cumbersome however when a need arises to evaluate a large number of conditions.

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. Will insert the default value for keys that are not found. For example the above version of the case statement ca be re written like this.

For example def test i 100 j 10 k 0 end this method when called will return the last declared variable k. The case statement is more flexible than it might appear at first sight. Notice that we use two equal symbols to mean equality. If you don t this right you won t get the expected results.

So you can safely wrap a case statement in a method call and ruby will have no problems with it. This will produce the following result. Case capacity when 0 you ran out of gas. For the tests in these control expressions.