Final answer:
The if-else structure is used to output 'Yes' if a variable is positive, or 'No' otherwise.
Step-by-step explanation:
The branch structure used to output 'Yes' if a variable's value is positive, or 'No' otherwise is the if-else structure.
Here's an example:
if (variable > 0) { output 'Yes'; } else { output 'No'; }
In this example, if the value of the variable is greater than 0, the program will output 'Yes', otherwise it will output 'No'.
Learn more about If-else structure for outputting positive or negative value