As unless is a negated form of if, until is really a negated form of while. : until « Statement « Ruby

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Ruby » Statement » until   As unless is a negated form of if, until is really a negated form of while. # Compare the following statements. The first is a while loop: weight = 150 while weight < 200 do   puts "Weight: " + weight.to_s   weight += 5 end # Here is the same logic expressed with until: weight = 150 until weight == 200 do   puts "Weight: " + weight.to_s   weight += 5 end   Related examples in the same category 1.  Here's the formal specification for the until loop: 2.  until keeps looping while its condition remains false, or not true. 3.  like while, you have another form you can use with untila?that is, with begin/end: 4.  until loops until a certain condition is met 5.  unless and until

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