Explain the principle of synchronous operations and their purpose in programming.

Synchronous operations are performed sequentially: the next operation begins only after the previous one is completed. In programming, this means that the execution thread is blocked until the current task's result is received. This approach is simple to understand and debug, but can lead to delays if the operation takes a long time (for example, a network request or file reading). Synchronous operations are useful when the sequence of actions is important and when delays are minimal or acceptable. For example, in simple calculations or when it is necessary to ensure that data is received before continuing.