// Get the values from the Page
            function getValues()
            {
              // - get value from page
              let startValue = document.getElementById("startValue").value;
              let endValue = document.getElementById("endValue").value;
            
              // parse into int
              startValue = parseInt(startValue);
              endValue = parseInt(endValue);
              let numbers = [];
            
              if(Number.isInteger(startValue) && Number.isInteger(endValue)) 
              {
                // - call generateNumbers
                numbers = generateNumbers(startValue, endValue);
                // We call displayNumbers
                displayNumbers(numbers);
              }
              else
              {
                alert("You must enter integers");
              }
            }
            
            // generate numbers from startValue and endValue
            function generateNumbers(sValue, eValue)
            {
              let numbers = [];
            
              for (let i = sValue; i <= eValue; i++){
                numbers.push(i);
              }
              return numbers;
            }
            
            // display the numbers and mark the even number bold
            function displayNumbers(numbers)
            {
            
              let className = "even";
              let templateRows = "";
            
              for (let i = 0; i < numbers.length; i++)
              {
                let number = numbers[i];
            
                if(number %  2 === 0)
                {
                  className = "even";
                }
                else
                {
                  className = "odd";
                }
                // This does not render correctly with Prism. See source code.
                templateRows += `${number}`
              }
              document.getElementById("results").innerHTML = templateRows;
            }

          
          

Hundo: Zero to 100

This function takes a starting and an ending number, and prints out all numbers between, with even values in bold.