2.js

// Predict and explain first...

// Predict the output of the following code:
// =============>
// The last digit of 42 is 3
// The last digit of 105 is 3
// The last digit of 806 is 3

const num = 103;

function getLastDigit() {
  return num.toString().slice(-1);
}

console.log(`The last digit of 42 is ${getLastDigit(42)}`);
console.log(`The last digit of 105 is ${getLastDigit(105)}`);
console.log(`The last digit of 806 is ${getLastDigit(806)}`);

// Now run the code and compare the output to your prediction
// =============>// The last digit of 42 is 3
// The last digit of 105 is 3
// The last digit of 806 is 3
// Explain why the output is the way it is
// =============> the variable num is assigned to the value 103 in the global scope and not assigned to any value in the function scope
// Finally, correct the code to fix the problem
// =============> write your new code here
function getLastDigit(num) {
  // we add the identifier num as parameter to the function getLastDigit
  return num.toString().slice(-1);
}

console.log(`The last digit of 42 is ${getLastDigit(42)}`);
console.log(`The last digit of 105 is ${getLastDigit(105)}`);
console.log(`The last digit of 806 is ${getLastDigit(806)}`);

// This program should tell the user the last digit of each number.
// Explain why getLastDigit is not working properly - correct the problem