The program checks for addition ( ), subtraction multiplication (*), and division (/) operators. when the division operator is encountered, a check for division by zero is included. a check for an invalid operator is included as well. (e. g. 134.6 ! 23.1) a switch statement with a nested double-sided alternative for handling the division operator is used to solve the problem as these mutually exclusive events suggest.

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the major difference between the two is the objective and the reward of the game. candy crush has a puzzle theme with the objective of meeting a specific quota of points or objects, you are able to gain access to the next level and compete with peers on the process. on duolingo the objective is rather different, you are given sets of questions for you to answer for you to move to the next level and as for the reward, you are able to learn available language as this is an app developed to teach the user about other languages.