Question

Write an event handler so that when the user clicks the Press to Count button a function executes. The function should get the sentence and the letter from the textboxes and determine how many times the letter appears in the sentence (both upper and lowercase). The function should print the count to the html page.

Answer 1

To count the occurrences of a letter in a sentence, attach an event listener to a button. The event listener calls a function that counts the letter occurrences, ignoring case sensitivity, and then displays the result on the HTML page.

Step-by-step explanation:

To handle the event where a user clicks a button to count the occurrence of a letter in a sentence, you can write an event handler in JavaScript. This event handler will trigger a function that retrieves the sentence and the letter from two separate textboxes. It will then count how many times that letter appears in the sentence, considering both uppercase and lowercase letters. The result will be displayed on the HTML page.

In your JavaScript code, you would define the countLetters() function. Inside the function, you can get the sentence and letter from the textboxes using the appropriate DOM methods. Then, you can use a loop to iterate through each character in the sentence and count how many times the letter appears. Finally, you can update the HTML page with the count using a document.getElementById() and innerHTML.