Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What type of error will occur if a program is not working as expected?

### Response:
A runtime error will occur if a program is not working as expected. Runtime errors are caused by errors in a program's code that prevent it from running as intended. Runtime errors can range from simple errors such as incorrect syntax to more serious errors such as an out of bounds array.