on Saturday, 18th of July, 2020
Dart supports sever built in types. These are the most common of the types that represent a single value.
int is a whole number (integer).
int one = 1; int age = 45; int year = 2020; // an int can be negative int balance = -45;
double is a floating-point number, or a number with a decimal point.
double percent = .65; double rating = 4.5; // a double can be negative double negativeNumber = -87.42;
num is a super class of both
double. Which means you can use
num when dealing with numbers that could be an integer or floating-point number. They're best used when you don't know which of the types will be used.
num sum; // now sum has an int value sum = 4 + 5; // by adding a double, sum now refers to a double value sum = sum + 5.5;
- previous: dynamic