Final result - https://anasegarra.github.io/js-calculator/
The purpose of this activity is to build a basic calculator using vanilla JavaScript. It allows basic mathematical operations such as addition, subtraction, multiplication and division.
User can make a single calculation as well as consecutive calculations and clear everything or delete a single digit.
Finally, if user enters only the first operand, chooses an operator and then hits equal, result is calculated based on that first operando. For example, an input of 6 + = would result in 12 and one of 6 * = would result in 36.