Ruby provides a special statement which is referred as unless statement. This statement is executed when the given condition is false. It is opposite of if statement. In if statement, the block executes once the given condition is true, however in unless statement, the block of code executes once the given condition is false.
Unless statement is used when we require to print false condition, we cannot use if statement and or operator to print false statements because if statement and or operator always works on true condition.
unless condition # code else # code end
Here else block is executed when the given condition is true.
unless Modifier: You can also use unless as a modifier to modify an expression. When you use unless as a modifier the left-hand side behaves as a then condition and right-hand side behaves as a test condition.
statement unless condition
Attention reader! Don’t stop learning now. Get hold of all the important DSA concepts with the DSA Self Paced Course at a student-friendly price and become industry ready.