Nested Conditionals

A nested conditional is a conditional statement within the block of another conditional statement. For example:

let materialCovered = true;
let studied = true;
if (materialCovered) {
	if (studied) {
		console.log("We covered the material and I understand it");
	}
	else {
		console.log("We covered the material but I do not understand it");
	}
}
else {
	console.log("We have not covered the material yet");
}
// Outputs: We covered the material and I understand it

When using nested conditionals, it is good to use indentation to avoid confusing yourself. Remember that a more indented block of code follows a {.

Nested conditionals can often be rewritten as chained conditions using logical operators. Our example can be rewritten as follows:

let materialCovered = true;
let studied = true;
if (materialCovered && studied) {
	console.log("We covered the material and I understand it");
}
else if (materialCovered && !studied) {
	console.log("We covered the material but I do not understand it");
}
else {
	console.log("We have not covered the material yet");
}
// Outputs: We covered the material and I understand it

It is important to realize that no method is "wrong." In different situations, one method may seem more logical, so feel free to use it.