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// String -> int
var myVal = int.parse('24');
assert(myVal == 24);

// String -> double
var piVal = double.parse('3.14');
assert(piVal == 3.14);

// int -> String
String valAsString = 55.toString();
assert(valAsString == '55');

// double -> String
String piAsString = 3.14159.toStringAsFixed(2);
assert(piAsString == '3.14');