Ruby Case Switch

Basically if elsif else notice there s nothing after the word case.

Ruby case switch.

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. 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. The following case example detects where a number falls amongst a group of different ranges.

The expression specified by the when clause is evaluated as the left operand. 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. Variable case when bool condition statements when bool condition statements else the else clause is optional statements end if you assigned variable before.

The components of a case statement in ruby. Ruby case statement last updated. The case statement is a multiway branch statement just like a switch statement in other languages. Whenever you need to use some if elsif statements you could consider using a ruby case statement instead.

It provides an easy way to forward execution to different parts of code based on the value of the expression. Ruby uses case and when where others use switch and case. Ruby 入門 条件分岐. In other programming languages this is known as a switch statement.