JavaScript: Check whether an 'input' is a string or not
JavaScript String: Exercise-1 with Solution
Write a JavaScript function to check whether an 'input' is a string or not.
Test Data:
console.log(is_string('w3resource'));
true
console.log(is_string([1, 2, 4, 0]));
false
Pictorial Presentation:

Sample Solution:-
HTML Code:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Check whether an input is a string or not</title>
</head>
<body>
</body>
</html>
JavaScript Code:
is_string = function(input) {
if (Object.prototype.toString.call(input) === '[object String]')
return true;
else
return false;
};
console.log(is_string('w3resource'));
console.log(is_string([1, 2, 4, 0]));
Sample Output:
true false
Flowchart:

Live Demo:
See the Pen JavaScript Print an integer with commas as thousands separators - string-ex-1 by w3resource (@w3resource) on CodePen.
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JavaScript: Tips of the Day
Tagged template literals
function getPersonInfo(one, two, three) { console.log(one); console.log(two); console.log(three); } const person = 'Lydia'; const age = 21; getPersonInfo`${person} is ${age} years old`;
If you use tagged template literals, the value of the first argument is always an array of the string values. The remaining arguments get the values of the passed expressions!
Ref: https://bit.ly/323Y0P6
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