Slider widget in Flutter - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a basic Slider widget with a value of 0.5.

Flutter

Slider(value: [1], onChanged: (newValue) {})

Drag options to blanks, or click blank then click option'

Anull

B1

Ctrue

D0.5

Attempts:

3 left

💡 Hint

Common Mistakes

Using an integer like 1 without decimal point

Setting value to null or boolean

Omitting the value property

The value property of Slider must be a double between 0.0 and 1.0. Here, 0.5 sets the slider in the middle.

2fill in blank

medium

Complete the code to update the slider's value when the user moves it.

Flutter

Slider(value: sliderValue, onChanged: ([1]) { setState(() { sliderValue = [1]; }); })

Drag options to blanks, or click blank then click option'

Avalue

BnewValue

Cindex

Dcontext

Attempts:

3 left

💡 Hint

Common Mistakes

Using a parameter name that is not used inside the callback

Forgetting to update the state inside setState

The onChanged callback receives the new slider value as a parameter. Naming it newValue is common and clear.

3fill in blank

hard

Fix the error in the Slider widget by completing the missing property for minimum value.

Flutter

Slider(value: sliderVal, min: [1], max: 10, onChanged: (val) { setState(() { sliderVal = val; }); })

Drag options to blanks, or click blank then click option'

A0

B1

C-1

Dnull

Attempts:

3 left

💡 Hint

Common Mistakes

Setting min to null or a value greater than max

Using a negative number when not intended

The min property sets the slider's minimum value. It must be a double or int. Usually, 0 is the start.

4fill in blank

hard

Fill both blanks to create a Slider that only allows integer steps from 0 to 5.

Flutter

Slider(value: sliderVal.toDouble(), min: [1], max: [2], divisions: 5, onChanged: (val) { setState(() { sliderVal = val.toInt(); }); })

Drag options to blanks, or click blank then click option'

A0

B5

C10

D1

Attempts:

3 left

💡 Hint

Common Mistakes

Setting max less than min

Not matching divisions with max-min range

Setting min to 0 and max to 5 with divisions: 5 creates steps of 1 between 0 and 5.

5fill in blank

hard

Fill all three blanks to create a Slider with a label showing the current value rounded to an integer.

Flutter

Slider(value: sliderVal, min: 0, max: 100, divisions: 100, label: sliderVal.[1]().toString(), onChanged: (val) { setState(() { sliderVal = val; }); })

Drag options to blanks, or click blank then click option'

Around

Bfloor

Cceil

DtoInt

Attempts:

3 left

💡 Hint

Common Mistakes

Using floor or ceil which always round down or up

Using toInt which truncates without rounding

The round() method rounds the double to the nearest integer, which is then converted to string for the label.