Data types (int, double, String, bool) in Flutter - UI Render Trace

Component - Data types (int, double, String, bool)

This Flutter widget shows examples of the four basic data types: int (whole numbers), double (decimal numbers), String (text), and bool (true or false). It displays their values on the screen in a simple list.

Widget Tree

Scaffold
├─ AppBar
│  └─ Text
└─ Body
   └─ Padding
      └─ Column
         ├─ Text (int value)
         ├─ Text (double value)
         ├─ Text (String value)
         └─ Text (bool value)

The Scaffold provides the basic page structure with an AppBar at the top showing a title. The body has padding around a Column that stacks four Text widgets vertically. Each Text widget shows one data type's value.

Render Trace - 8 Steps

Step 1: Scaffold

Step 2: AppBar

Step 3: Padding

Step 4: Column

Step 5: Text (int value)

Step 6: Text (double value)

Step 7: Text (String value)

Step 8: Text (bool value)

State Change - Re-render

Trigger:No state change in this static example

Before

Initial display of data type values

→

After

No change, values remain the same

Re-renders:None, widget is stateless and static

UI Quiz - 3 Questions

Which widget shows the decimal number in this UI?

A AppBar widget

B Text widget showing 'int value: 42'

C Text widget showing 'double value: 3.14'

D Padding widget

Key Insight

Using simple Text widgets inside a Column is an easy way to display multiple data values clearly. Padding helps keep the content readable by adding space around it. This layout is common for showing lists or examples in mobile apps.