Ruby Case Statement Return Value

Result case value when match1 then result1 when match2 then result2 when match3 then result3 when match4 then result4.

Ruby case statement return value.

Notice that we use two equal symbols to mean equality. With an if statement you can check if something is true. So you can safely wrap a case statement in a method call and ruby will have no problems with it. Return values from methods.

For the tests in these control expressions. This will produce the following result. 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. Hash indexes keys returns a new array consisting of values for the given key s.

The case statement is more flexible than it might appear at first sight. Let s see an example where we want to print some message depending on what range a value falls in. Usr bin ruby for i in 0 5 puts value of local variable is i end here we have defined the range 0 5. But when you want to check for the opposite not true false.

1 value is set 3 value is set ruby case statement syntax case expression when expression expression then code. Nil and false are false values. A case statement will always return a single object just like a method call. A much easier way to handle such situations is to use the ruby case statement the syntax for which is defined as follows.

True and any other object are true values. 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. This method is deprecated.

Here we have explained if expression ternary if unless expression modifier if and unless and case expression. Every method in ruby returns a value by default. This can quickly become cumbersome however when a need arises to evaluate a large number of conditions. Case capacity when 0 you ran out of gas.

Hash index value returns the key for the given value in hash nil if no matching value is found. Things are no different when it comes to case statements. This returned value will be the value of the last statement. The statement for i in 0 5 will allow i to take values in the range from 0 to 5 including 5.

For example def test i 100 j 10 k 0 end this method when called will return the last declared variable k. All the expressions described here return a value. One equals sign in ruby means assignment make sure to use when you want to find out if two things are the same. The return statement in ruby is used to return one or more values.