Ruby Case Switch

In other programming languages this is known as a switch statement.

Ruby case switch.

Number ranges and the case statement. The following case example detects where a number falls amongst a group of different ranges. The case statement is a multiway branch statement just like a switch statement in other languages. The expression specified by the when clause is evaluated as the left operand.

Ruby uses case and when where others use switch and case. Whenever you need to use some if elsif statements you could consider using a ruby case statement instead. Ruby case statement syntax case expression when expression expression then code. It provides an easy way to forward execution to different parts of code based on the value of the expression.

Score 70 result case score when 0 40 then fail when 41 60 then pass when 61 70 then pass. The components of a case statement in ruby. In this post you will learn a few different use cases and how it all really works under the hood. Ruby case statement last updated.

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. 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. 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.