Ruby If Then One Line

Or a newline or the then keyword.

Ruby if then one line.

In ruby the condition and the then part of an if expression must be separated by either an expression separator i e. Ruby has some amazing shorthands for if then else statements. A 5 a 7 if a 4 print a prints 5 since the if block isn t executed unless expression. If item rigged then yes else no end if item rigged.

So all of these would work. I m getting into the habit of using these a lot more consistently so i wanted to share. The unless expression is the opposite of the if expression the code. Notice that we use two equal symbols to mean equality.

With an if statement you can check if something is true. A 7 end note that the syntax for if one line blocks do not work anymore in ruby 1 9. If a 4 then a 7 end or if a 4. The github ruby styleguide recommends that one liners be reserved for trivial if else statements and that nested ternary operators be avoided.

If you don t this right you won t get the expected results. Executes code if the conditional is true. You could use the then keyword but its considered bad practice. Notice ruby uses elsif not else if nor elif.

If the conditional is not true code specified in the else clause is executed. These shorthands beautifully consolidate three or more lines of code into one readable line of code. If foo then a elsif bar then b else c end you could use cases ruby s switch operator if find your control statements overly complex. Yes else no end if item rigged yes else no end.

Ternary statements still work this is equal to.