String to Int, String to Double & Int to String

In Dart, you can convert a string to an integer using the int.parse() function.

In this example, the int.parse() function is used to convert the string "1212" to an integer.
If the string contains a valid integer representation, the conversion will succeed, and the result will be stored in the integerValue variable.
However, if the string is not a valid integer representation a FormatException will be thrown.
Here is the example:

If you want to handle the case where the string might not be a valid integer, you can use a try-catch block to catch and handle the exception.
Here is the example:

Remember to handle potential errors when converting strings to integers to ensure your program behaves as expected, especially if the input data is not guaranteed to be a valid integer representation.

In Dart, you can convert a string to a double using the double.parse() function.
Here is the example:

In this example, the double.parse() function is used to convert the string "3.14" to a double.
If the string contains a valid decimal representation, the conversion will succeed, and the result will be stored in the doubleValue variable.
Just like with int.parse(), if the string is not a valid decimal representation (e.g., "abc" instead of a number), a FormatException will be thrown. To handle potential errors, you can use a try-catch block:

This ensures that your program doesn't crash if the string is not a valid decimal number, and it allows you to handle the error in a controlled way.

In Dart, you can covert an integer to a string using the toString() method.
- In this example, the toString() method is used to convert the integer 42 to a string. The result is then stored in the stringValue variable, and you can use it in your program.
- This can be particularly useful when you need to concatenate (combine) strings with integers or when working with functions that expect string arguments.