First init

_small_exercices/calculate_weight.js

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+// Write your function here:
+
+function calculateWeight(earthWeight, planet) {
+  if (!Number.isInteger(earthWeight)) {
+    return("Please enter an integer for weight.");
+  }
+  if (typeof planet !== "string") {
+    return("Please enter a string for planet.");
+  }
+
+  switch (planet) {
+    case "Mercury" :
+      return earthWeight * 0.378;
+    case "Venus" :
+      return earthWeight * 0.907;
+    case "Mars" :
+      return earthWeight * 0.377;
+    case "Jupiter" :
+      return earthWeight * 2.36;
+    case "Saturn" :
+      return earthWeight * 0.916;
+    default :
+      return("Invalid Planet Entry. Try: Mercury, Venus, Mars, Jupiter, or Saturn.");
+  }
+}
+
+console.log(calculateWeight(100, "Camembert"));
+
+
+
+
+
+// Uncomment the line below when you're ready to try out your function
+// console.log(calculateWeight(100, 'Jupiter')) // Should print 236
+
+// We encourage you to add more function calls of your own to test your code!

_small_exercices/race_day.js

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+const getRunner = (runners) => {
+  let runner = 0;
+
+  while (runner < runners) {
+    let raceNumber = Math.floor(Math.random() * 1000);
+    let isRegistered = Math.random() < 0.5; // get 50% chance of getting true
+    let runnerAge = Math.floor(Math.random() * 45 + 15); // considering a minimum age of 15yo and maximum age of 60yo
+    
+    if (isRegistered && runnerAge > 18) {
+        raceNumber += 1000;
+        console.log(`Runner ${raceNumber} are to begin race at 09:30 MT.`);
+      } else if (!isRegistered && runnerAge > 18) {
+        raceNumber += 1000;
+        console.log(`Runner ${raceNumber} are to begin race at 11:00 MT. Please register before 10:00 MT.`);
+      } else if (runnerAge < 18) {
+        console.log(`Runner ${raceNumber} are to begin race at 12:30 MT. Please register before 11:30 MT.`);
+      } else {
+        console.log(`Please come to the registration desk for clarification.`);
+      }
+    runner++;
+    }
+}
+
+getRunner(10);

_small_exercices/rock_paper_scissors.js

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+const getComputerChoice = () => {
+  const randomValue = Math.floor(Math.random() * 3);
+  switch (randomValue) {
+    case 0 :
+      return "rock";
+    case 1 :
+      return "paper";
+    case 2 :
+      return "scissors";
+  }
+}
+
+const getUserChoice = (userInput) => {
+  userInput ? userInput = userInput.toLowerCase() : userInput = getComputerChoice();
+  switch (userInput) {
+    case "rock" :
+    case "paper" :
+    case "scissors" :
+    case "bomb" :
+      return userInput;  
+    default :
+      console.log('Error: Invalid input. Please choose rock, paper, scissors, or bomb.');
+      return null;
+  }
+}
+
+const determineWinner = (userChoice, computerChoice) => {
+  if (userChoice === computerChoice) {
+    return(`${userChoice} against ${computerChoice}. Tie.`);
+  } else if (userChoice === "bomb") {
+    return(`${userChoice} against ${computerChoice}. The bomb exploded, everything but the user lose.`);
+  } else if (userChoice === "rock") {
+    if (computerChoice === "paper") {
+      return(`${userChoice} against ${computerChoice}. Computer wins.`);
+    } else {
+      return(`${userChoice} against ${computerChoice}. User wins.`);
+    }
+  } else if (userChoice === "paper") {
+    if (computerChoice === "scissors") {
+      return(`${userChoice} against ${computerChoice}. Computer wins.`);
+    } else {
+      return(`${userChoice} against ${computerChoice}. User wins.`);
+    }
+  } else if (userChoice === "scissors") {
+    if (computerChoice === "rock") {
+      return(`${userChoice} against ${computerChoice}. Computer wins.`);
+    } else {
+      return(`${userChoice} against ${computerChoice}. User wins.`);
+    }
+  } 
+}
+
+/*console.log(determineWinner("rock", "scissors"));
+console.log(determineWinner("rock", "paper"));
+console.log(determineWinner("bomb", "rock"));*/
+
+const playGame = (choice) => {
+  const userChoice = getUserChoice(choice);
+  const computerChoice = getComputerChoice();
+
+  console.log(`
+User choose       > ${userChoice}
+Computer choose   > ${computerChoice}
+------------------------------`);
+
+  console.log(determineWinner(userChoice, computerChoice));
+}
+
+playGame(); // type "bomb" to cheat