What do AC and CE mean on a calculator?

AC (All Clear) and CE (Clear Entry) are two important clearing functions found on most calculators that serve different purposes for managing calculator operations and memory.

Understanding the distinction between these two clearing functions is essential for efficient calculator use, whether you're performing basic arithmetic or complex calculations.

AC (All Clear) Function

AC stands for All Clear and performs a complete reset of the calculator. When you press the AC button, it clears the current calculation, resets all active functions, and returns the calculator to its initial state. This includes clearing any pending operations, stored values, and returning the display to zero.

The AC function is particularly useful when you want to start fresh with a new calculation or when you've made an error that affects the entire calculation sequence.

CE (Clear Entry) Function

CE stands for Clear Entry and provides a more selective clearing option. This function only erases the last number or entry you have input, without affecting the rest of your calculation or any stored operations.

For example, if you're calculating 25 + 37 but accidentally type 25 + 39, pressing CE will clear only the "39" entry, allowing you to type the correct "37" without starting the entire calculation over.

Key Differences

Memory Clearing

It's important to note that on some calculators, the memory function may require separate clearing. After using AC, you might need to press additional buttons like Min (Memory Clear) or MC to completely clear stored memory values, depending on your calculator model.

Conclusion

AC provides a complete calculator reset for starting fresh, while CE offers selective clearing of just the last entry. Understanding these functions helps you efficiently manage calculations and correct errors without losing progress on complex computations.