How do you chain multiple if statements?

Question

IOS Development, Functional Programming in C, Conditionals Quiz. On the conditionals quiz I can't seem to find out how to chain multiple if statements.

Answer 1 · 2014-03-01T23:19:06Z

March 1, 2014 11:19pm

So the important thing to understand about if statements is that you can have multiple cases. If you only have 1 case that you're checking for (e.g. if (x) {//do y} ) then you don't use an else clause. If you have two cases, you have at least two options:

write if/else statements -

if (x) {
// do y
} else {
// do z
}

write if/else if statements -

if (x) {
// do y
} else if (v) {
// do z
}

The difference between these two is that you are specifying that you need some expression 'v' to be true to 'do z' in option 2, whereas in option 1 you are writing a sort of catch-all that will handle any case not handled by the first if statement that's looking for some expression 'x' to be true in order to 'do z'. The purpose of 'else if' statements is to catch more cases before you hit the 'else' at runtime. For example, you can chain if statements like so:

if (a) {
// do b
} else if (c) {
// do d
} else if (e) {
// do f
} else {
// do z
}

Here, we have three clauses before we hit the 'else' case. The first being the 'if', and the other two being 'else if' statements. you can have as many of these 'else if' statements as you want before 'else' so that you can catch more conditions before else handles the rest that aren't handled.

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simondumalski

simondumalski

How do you chain multiple if statements?

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Alex Uribe

Alex Uribe