This is not exactly a direct conversion method and I personally prefer any of the above, but if for some reason you don't have access to them, you can use this alternative. bool success = bool.TryParse("True", out bool result) // success: Trueīool success = bool.TryParse("False", out bool result) // success: Trueīool success = bool.TryParse(null, out bool result) // success: Falseīool success = bool.TryParse("thisIsNotABoolean", out bool result) // success: False Also, the converted value now appears in an out bool result output parameter instead of being returned by the function. Similar to bool.Parse except that it doesn't throw any exceptions directly, instead it returns a boolean value indicating whether or not the conversion could be performed. (case insensitive)īool result = ("False") īool result = ("thisIsNotABoolean") īool.TryParse(string value, out bool result) Valid, also TRUE, FALSE, true, false, trUE, FAlse, etc. Note that both will throw a FormatException if the input string does not represent a boolean, whereas if the input string is null, bool.Parse will throw an ArgumentNullException while just returns false. I will proceed to explain some of them below:īool.Parse(string value) or (string value)īoth methods are quite similar in that they both take a string as their input value and return the boolean representation of that string as their output value. So, if we pass a string containing boolean text, it will convert that string to a boolean value.C# offers several ways to convert a string value to a boolean value. The JSON.parse() method converts a string to its corresponding object type.If both operands are the same, these operators return true. The comparison and identity operators compare the operands present on their left-hand and right-hand sides.It returns true if a match is found and false otherwise. Dim A, B, Check A 5: B 5 ' Initialize variables. If the expression evaluates to a nonzero value, CBool returns True, otherwise, it returns False. The test() method uses regular expressions to match the text in a string. This example uses the CBool function to convert an expression to a Boolean.The switch-case statement allows us to convert different types of string values to boolean values.The Boolean wrapper class and the double NOT operator are not recommended to convert strings to boolean values.If a boolean value is stored in a string, JavaScript provides multiple methods through which we can convert that string into a boolean value.This is why we should avoid using this operator while converting strings to boolean values. Also, when we tried to convert both "true" and "false" strings to boolean, in both cases, the !! operator converted these strings to true. In any other case, this method will return false.įrom the above example, we can see that when we tried to convert an empty string ( '') to a boolean, the !! operator converted that string to false. If the given string contains "true", the test() method will return true. In order to convert a string to a boolean using the test() method, we simply need to match a regular expression object containing true with the given string. The test() method is a method of the RegExp object. Converts the value of the specified 8-bit signed integer to an equivalent Boolean value. This method returns true if a match is found and false otherwise. The test() method in JavaScript uses regular expressions to match the given string. "true" or "false", while a boolean value is written without quotes, i.e. Note: In the following sections, a string value (containing true or false) is written within quotes, i.e. Convert String to Boolean in JavaScriptįollowing are the different ways in which we can convert strings to boolean values in JavaScript. In this article, we will learn about these methods.
There are various in-built functions that help convert strings to boolean in Javascript. If we wish to perform boolean operations on these values, these strings need to be converted into boolean values. It usually happens when we take string input from users or when we read files. In programming, sometimes boolean values ( true and false) are stored as strings ( "true" and "false"). We will also learn about those methods that should be avoided while converting strings to boolean in Javascript.We will understand the different ways through which the conversion from strings to boolean in JavaScript is possible.To do so, we have nine different ways in which we can convert string to boolean in JavaScript. There are times when we have a string that contains "true" or "false" and we need to convert these strings to boolean (or bool) in Javascript.
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