FAQ: Conditionals: Lesson - Review

This community-built FAQ covers the “Review” exercise from the lesson “Conditionals: Lesson”.

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Came back now that the full course is released. scanf() is used in the review hint, but was formatting explained anywhere?

I’m thinking the same thing! I could be wrong but i’d swear there is no explanation (or not sufficiently explicit) for the use of scanf() prior to this exercise.

This was a very strange lesson. I don’t remember being introduced to neither the scanf() function nor to the argument “&x”, which the hint suggested. Furthermore it says the lesson is optional, but I couldn’t click “up next” without solving the exercise, which meant I ended up just copying the hint.

Same here, follow carefully each previous lessons, scanf() was not approach.

I encounter the same problem with scanf()
I solved it like this, have no idea if it is right

#include <stdio.h>

int main() {

double earth_weight = 50;
printf(“Earth weight: %f kg\n”, earth_weight);
int numberPlanet = 3;

float mercury1 = earth_weight0.38;
float venus2 = earth_weight
float mars3 = earth_weight0.38;
float jupiter4 = earth_weight
float saturn5 = earth_weight1.06;
float uranus6 = earth_weight
float neptune7 = earth_weight*1.19;

if (numberPlanet = 1){
printf(“Mercury: %f\n”, mercury1);
else if (numberPlanet = 2){
printf(“Venus: %f\n”, venus2);
else if (numberPlanet = 3){
printf(“Mars: %f\n”, mars3);
else if (numberPlanet = 4){
printf(“Jupiter: %f\n”, jupiter4);
else if (numberPlanet = 5){
printf(“Saturn: %f\n”, saturn5);
else if (numberPlanet = 6){
printf(“Uranus: %f\n”, uranus6);
else if (numberPlanet = 7) {
printf(“Neptune: %f\n”, neptune7);