String to Int, String to Double & Int to String
String to Int:
- 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
integerValuevariable.However, if the string is not a valid integer representation a
FormatExceptionwill 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.
String to Double:
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
doubleValuevariable.Just like with
int.parse(), if the string is not a valid decimal representation (e.g., "abc" instead of a number), aFormatExceptionwill 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.
Int to String:
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 integer42to a string. The result is then stored in thestringValuevariable, 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.
