Loop or Repetitive Structure in Flowcharts

The flowchart symbol used to represent a loop or repetitive structure is the diamond shape (option C).

Explanation:

Flowcharts are graphical representations of a process or a program. They use different symbols to represent different types of actions or decisions. The diamond shape is commonly used to represent decision points in a flowchart, where the flow of the program can take different paths based on a condition.

However, the diamond shape can also be used to represent loops or repetitive structures in a flowchart. A loop is a programming construct that allows a section of code to be executed repeatedly until a certain condition is met.

Key Points:

- The diamond shape in a flowchart represents a condition or a decision point.
- It is used to determine the flow of the program based on a true or false condition.
- In the case of a loop or repetitive structure, the diamond shape is used to represent the condition that determines whether the loop should continue or exit.
- The loop will continue as long as the condition in the diamond shape is true.
- Once the condition becomes false, the program will exit the loop and continue with the next section of code.
- The diamond shape for a loop is connected to the starting point of the loop and the end point of the loop, forming a closed loop structure.

Example:

Here is an example of a flowchart with a loop represented by a diamond shape:

```
start --> [Condition: Is X less than 10?] -->
|
Yes
|
V
[Do Something] -->
|
No
|
V
end
```

In this example, the program will continue executing the "Do Something" section as long as the condition "Is X less than 10?" is true. Once the condition becomes false, the program will exit the loop and continue with the "end" section.

Conclusion:

The diamond shape is used to represent a loop or repetitive structure in a flowchart. It is a key symbol that helps in visualizing the flow of a program and determining the conditions for loops or decision points.