These shorthands beautifully consolidate three or more lines of code into one readable line of code.
Ruby if then else.
X 10 if x 8 then puts x is greater than 8 end.
Whenever you need to use some if elsif statements you could consider using a ruby case statement instead.
You can also say if this is not true then do this other thing.
In this post you will learn a few different use cases and how it all really works under the hood.
If you are opening a file which does not exist then if you did not handle this situation properly then yo.
In other programming languages this is known as a switch statement.
If stock 1 puts sorry we are out of stock else puts thanks for your order end.
If var 10 print variable is 10 elsif var 20 print variable is 20 else print variable is something else end.
Ruby case statement last updated.
H ruby abc rb x is greater than 8.
An if expression s conditional is separated from code by the reserved word then a newline or a semicolon.
H ruby abc rb x is greater than 8.
You can also add an else expression.
Remember using unless in ruby is just the reverse of using if.
Notice ruby uses elsif not else if nor elif.
The components of a case statement in ruby.
It is similar to the default keyword in another programming languages.
X 10 if x 8 puts x is greater than 8 end.
The values false and nil are false and everything else are true.
Ternary syntax is the same in ruby as most languages.
If the test expression evaluates to a true then the then expression is evaluated.
In ruby they are created by writing the if keyword followed by a condition optionally followed by the then keyword then the code you want to execute if the condition is true and then finally the end keyword to end the structure.
This is where else statements come in.
The case statement is a multiway branch statement just like a switch statement in other languages.
After an if.
You re saying if this is not true then do this.
If the conditional is not true code specified in the else clause is executed.
The if else statement.
It provides an easy way to forward execution to different parts of code based on the value of the expression.
Note that else if is actually spelled elsif without the e.
Ruby exceptions the execution and the exception always go together.
Ternary shortened if statement syntax.
Executes code if the conditional is true.
