JavaScript: Check whether a given string represents a correct sentence or not
JavaScript Basic: Exercise-114 with Solution
Write a JavaScript program to check whether a given string represents a correct sentence or not. A string is considered a correct sentence if it starts with a capital letter and ends with a full stop (.).
Sample Solution:
HTML Code:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title> Check whether a given string represents a correct sentence or not</title>
</head>
<body>
</body>
</html>
JavaScript Code:
function is_correct_Sentence(input_str) {
var first_char = input_str[0];
var last_char = input_str[input_str.length - 1];
return /[A-Z]/.test(first_char) && last_char == "."
}
console.log(is_correct_Sentence("This tool will help you write better English and efficiently corrects texts."));
console.log(is_correct_Sentence("This tool will help you write better English and efficiently corrects texts"));
console.log(is_correct_Sentence("this tool will help you write better English and efficiently corrects texts."));
Sample Output:
true false false
Flowchart:

ES6 Version:
function is_correct_Sentence(input_str) {
const first_char = input_str[0];
const last_char = input_str[input_str.length - 1];
return /[A-Z]/.test(first_char) && last_char == "."
}
console.log(is_correct_Sentence("This tool will help you write better English and efficiently corrects texts."));
console.log(is_correct_Sentence("This tool will help you write better English and efficiently corrects texts"));
console.log(is_correct_Sentence("this tool will help you write better English and efficiently corrects texts."));
Live Demo:
See the Pen javascript-basic-exercise-114 by w3resource (@w3resource) on CodePen.
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Previous: Write a JavaScript program to calculate the sum n + n/2 + n/4 + n/8 + .... where n is a positive integer and all divisions are integer.
Next: Write a JavaScript program to check whether a matrix is a diagonal matrix or not.
What is the difficulty level of this exercise?
Test your Programming skills with w3resource's quiz.
JavaScript: Tips of the Day
Randomizes the order of the values of an array, returning a new array
Example:
const tips_shuffle = ([...arr]) => { let x = arr.length; while (x) { const i = Math.floor(Math.random() * x--); [arr[x], arr[i]] = [arr[i], arr[x]]; } return arr; }; const foo = [2, 4, 6]; console.log(tips_shuffle(foo));
Output:
[4, 2, 6]
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