How can I convert a string to an integer in JavaScript without using parseInt()?
Antek N

To convert a string to an integer in JavaScript without usingparseInt(), you can leverage the unary plus operator (+),Number(), or theMath.floor() function. Here's an explanation of each approach: 1. Unary Plus Operator (+): - The unary plus operator converts a string to a numeric value. If the string represents a valid number, it will be converted to an integer. If the string contains non-numeric characters, the result will beNaN. - Example:const number = +stringValue; 2. Number() Constructor: - TheNumber() constructor can be used as a function to convert a string to a number. It behaves similarly to the unary plus operator, converting the string to a numeric value. If the string is not a valid number, the result will beNaN. - Example:const number = Number(stringValue); 3. Math.floor(): - TheMath.floor() function can be used to convert a string to an integer. It relies on the fact that it only returns the integer part of a number, effectively truncating any decimal places. - Example:const number = Math.floor(stringValue); It's important to note that all these approaches have their limitations. They will convert the string to a number if possible, but may not handle all cases correctly, such as leading/trailing whitespace, non-numeric characters, or large numbers that exceed JavaScript's numeric limits. Here's an example illustrating the use of the unary plus operator to convert a string to an integer:

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const stringValue = "42";
const number = +stringValue;
console.log(number); // Output: 42
console.log(typeof number); // Output: number

In the example above, the+ operator is used to convert the string"42" to the integer42. The resulting value is assigned to thenumber variable.

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