Ruby If Then Else One Line

I m getting into the habit of using these a lot more consistently so i wanted to share.

Ruby if then else one line.

Puts 123 if 2 even. H ruby abc rb x is greater than 8. First see a 10 the condition a 10 is comparing a with 10 and if a is greater than 10 then it is true and if smaller then false. H ruby abc rb x is greater than 8.

Here s the key difference between ruby and most other languages. Executes code if the conditional is true. Which is the same as. It s possible to write an if statement using just one line of code.

Puts 123 end this is a shorthand version which can be useful if you have a simple condition. X 10 if x 8 puts x is greater than 8 end. So the whole story is that if a 10 if a is greater than 10 then it will execute puts your number is greater than 10 otherwise it will execute puts your number not greater than 10 end at. These shorthands beautifully consolidate three or more lines of code into one readable line of code.

X 10 if x 8 then puts x is greater than 8 end. You can also add an else expression. Ruby provides a whole set of i o related methods implemented in the kernel module. If a 10 here we used if.

All the i o methods are derived from the class io. If else if syntax. If construct in one line. The simplest form of flow control and logic in ruby is called an if statement or technically speaking in ruby since everything is an expression an if.

An if expression s conditional is separated from code by the reserved word then a newline or a semicolon. If j 0 then if j 100 then. The ruby language has a very simple control structure that is easy to read and follow. Is there an alternative.

Database applications advanced php programming perl python java programming javascript programming c c programming ruby programming visual basic view more. One of the most powerful features present in most programming and scripting languages is the ability to change the flow of the program as certain conditions change. The values false and nil are false and everything else are true. The if then else statement in delphi code beginner delphi developers should watch out for if then else traps.

If the conditional is not true code specified in the else clause is executed. The then is optional. All in one line. If you have an if else expression there is also a shorthand for that.

The class io provides all the basic methods such as read write gets puts readline getc and printf. Notice ruby uses elsif not else if nor elif. This chapter will cover all the basic i o functions available in ruby. In the first line we are taking input.