Ruby Case Switch

Whenever you need to use some if elsif statements you could consider using a ruby case statement instead.

Ruby case switch.

The case statement is a multiway branch statement just like a switch statement in other languages. The components of a case statement in ruby. Variable case when bool condition statements when bool condition statements else the else clause is optional statements end if you assigned variable before. 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.

Basically if elsif else notice there s nothing after the word case. Ruby 入門 条件分岐. The case statement is also particularly useful when used in conjunction with number ranges for details of ranges read the ruby ranges chapter of this book. Ruby case statement last updated.

Score 70 result case score when 0 40 then fail when 41 60 then pass when 61 70 then pass. In this post you will learn a few different use cases and how it all really works under the hood. In most computer languages the case or conditional also known as switch statement compares the value of a variable with that of several constants or literals and executes the first path with a matching case in ruby it s a bit more flexible and powerful. In other programming languages this is known as a switch statement.

Ruby uses case and when where others use switch and case. Number ranges and the case statement. 1 is a fixnum hello is a string 2 is a 1 3 in the range of 比较让人产生误解的 大概就是1 1也为true 所以理解起来 也不纯碎是is a关系. It provides an easy way to forward execution to different parts of code based on the value of the expression.