Ruby Case Switch

Variable case when bool condition statements when bool condition statements else the else clause is optional statements end if you assigned variable before.

Ruby case switch.

Ruby case statement last updated. Ruby uses case and when where others use switch and case. Basically if elsif else notice there s nothing after the word case. 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 syntax case expression when expression expression then code. Whenever you need to use some if elsif statements you could consider using a ruby case statement instead. In this post you will learn a few different use cases and how it all really works under the hood. It provides an easy way to forward execution to different parts of code based on the value of the expression.

The case statement is a multiway branch statement just like a switch statement in other languages. In other programming languages this is known as a switch statement. The following case example detects where a number falls amongst a group of different ranges. Ruby 入門 条件分岐.

Number ranges and the case statement. The expression specified by the when clause is evaluated as the left operand. The components of a case statement in ruby. 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.