Result case value when match1 then result1 when match2 then result2 when match3 then result3 when match4 then result4.
Ruby case statement return value.
For example the above version of the case statement ca be re written like this.
For the tests in these control expressions.
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 indexes keys returns a new array consisting of values for the given key s.
Nil and false are false values.
Case capacity when 0 you ran out of gas.
True and any other object are true values.
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.
A much easier way to handle such situations is to use the ruby case statement the syntax for which is defined as follows.
The case statement is more flexible than it might appear at first sight.
This can quickly become cumbersome however when a need arises to evaluate a large number of conditions.
So you can safely wrap a case statement in a method call and ruby will have no problems with it.
For example def test i 100 j 10 k 0 end this method when called will return the last declared variable k.
This will produce the following result.
If you don t this right you won t get the expected results.
Here we have explained if expression ternary if unless expression modifier if and unless and case expression.
1 value is set 3 value is set ruby case statement syntax case expression when expression expression then code.
Every method in ruby returns a value by default.
Hash index value returns the key for the given value in hash nil if no matching value is found.
This returned value will be the value of the last statement.
Will insert the default value for keys that are not found.
A case statement will always return a single object just like a method call.
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.
With an if statement you can check if something is true.
Ruby case ranges.
But when you want to check for the opposite not true false.
Let s see an example where we want to print some message depending on what range a value falls in.
Notice that we use two equal symbols to mean equality.
Return values from methods.
This method is deprecated.
The statement for i in 0 5 will allow i to take values in the range from 0 to 5 including 5.
