Give the difference betewen recursion and interation in c. sight what are the advantages and their disadvantages?

I believe you mean iteration. Recursion is when you have a function that calls or uses it's self. it's advantageous because it reduces the amount of code but can fall victim to an endless loop. Iteration is using a while loop or any kind of loop to iterate through a data set normally an array, iteration allows you to do an action for every iterated item but a downside is that it takes a long time to iterate and it is not efficient

Don't say anything that will offend her, make her feel better and talk about happ things.