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What is Variable?

In our School life , we have seen something like a + b = c where,                                                                                  a = 8,                                                                                  b = 2 , so c = ? Well we can solve this mathematical problem , right ? But what if we want to solve the same problem throughout any Programming language , then something called " var " came to picture . So take a seat , and let's start ..   In Programming language, if we want to adding two digits for example 3 + 5 and want to print it , ...