Ruby If Then Else One Line

If you have an if else expression there is also a shorthand for that.

Ruby if then else 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. X 10 if x 8 puts x is greater than 8 end. Executes code if the conditional is true. The class io provides all the basic methods such as read write gets puts readline getc and printf.

Puts 123 if 2 even. I m getting into the habit of using these a lot more consistently so i wanted to share. If the test expression evaluates to a true then the then expression is evaluated. All in one line.

If j 0 then if j 100 then. Puts 123 end this is a shorthand version which can be useful if you have a simple condition. Here s the key difference between ruby and most other languages. If a 10 here we used if.

Notice ruby uses elsif not else if nor elif. If var 10 print variable is 10 end. X 10 if x 8 then puts x is greater than 8 end. An if expression s conditional is separated from code by the reserved word then a newline or a semicolon.

In the first line we are taking input. H ruby abc rb x is greater than 8. The ruby language has a very simple control structure that is easy to read and follow. 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.

It s possible to write an if statement using just one line of code. If construct in one line. If var 10 print variable is 10 else print variable is something else end. The then is optional.

These shorthands beautifully consolidate three or more lines of code into one readable line of code. 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. Which is the same as. Is there an alternative.

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. You can also add an else expression. If the conditional is not true code specified in the else clause is executed. All the i o methods are derived from the class io.

The values false and nil are false and everything else are true. If else if syntax. The if then else statement in delphi code beginner delphi developers should watch out for if then else traps. Ruby provides a whole set of i o related methods implemented in the kernel module.