Similarly, we have also other way to convert the string to boolean using the JavaScriptBoolean()constructor. The JavaScript Boolean() constructor takes the string as an argument and returns the boolean representation of it. Here is an example: letuser="Gowtham";letresult=Boolean(user);console.lo...
letstr ="true";console.log(str ==='true'); str ="True";console.log(str.toLowerCase() ==='true'); 输出 true true 方法3:使用Boolean() 函数 布尔函数返回变量的布尔值。它还可用于查找条件、表达式等的布尔结果。Boolean() 函数计算输入并返回布尔值。在这种情况下,由于输入字符串“true”非空,...
5 JavaScript Convert String to Boolean 6 7 8 9 // Defining a custom function 10 function stringToBoolean(value){ 11 return (String(value) === '1' || String(value).toLowerCase() === 'true'); 12 } 13 14 // Performing some tests 15 console.log(stringToBoolean(true)); ...
JavaScript has several ways to convert a string to a boolean. One way is to use the Boolean() function, which returns the boolean value of a given variable. For example: let str = "true"; let bool = Boolean(str); console.log(bool); // outputs: true Another way is to use the =...
Boolean(value); !!value; # Convert Values to Boolean# Stringconst string = 'string'; !!string; // true Boolean(string); // true # Numberconst number = 100; !!number; // true Boolean(number); // true # Falsy ValuesIn JavaScript, there are 6 falsy values. If you convert any...
In JavaScript, there are a couple of ways to convert any value to a boolean value. Let’s see them one by one. The Boolean() object The Bang Bang (!!) operator Converting “true”/“false” to boolean The Boolean() object The first way to convert any value to a boolean value is ...
You can simply use the strict equality operator (===) if you wants to convert a string representing a boolean value, such as, 'true' or 'false' into an intrinsic Boolean type in JavaScript.Let's take a look at the following example to understand how it basically works:ExampleTry this ...
// This function updates the histogram with the letters of text. add(text) { // Remove whitespace from the text, and convert to upper case text = text.replace(/\s/g, "").toUpperCase(); // Now loop through the characters of the text ...
Literal: a literal value; use Literal.getValue() to obtain a string representation of its value, and Literal.getRawValue() to obtain its raw source text (including surrounding quotes for string literals). NullLiteral, BooleanLiteral, NumberLiteral, StringLiteral, RegExpLiteral: different kinds of...
When checking user’s input, it’s useful sometimes to convert text to upper case or lower case.When you want to question your user, it’s complicated to anticipate all the possible answers. For example, if you ask him about the capital of France, the user might answer “Paris”, “...