036 Outputting Widgets Conditionally | #flutter | #flutterdeveloper | learn flutter | course

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In Flutter, you can conditionally output widgets based on a certain condition using various techniques, including:

if-else statements: You can use the if-else statement to conditionally render a widget. For example, to conditionally render a Text widget based on a boolean value, you can write:
kotlin
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if (showText) {
return Text('This text will be shown if showText is true');
} else {
return Container();
}
In this example, if the showText boolean value is true, the Text widget will be displayed. Otherwise, an empty Container widget will be rendered.

Ternary operator: You can also use the ternary operator to conditionally render a widget. For example:
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return showText ? Text('This text will be shown if showText is true') : Container();
In this example, if showText is true, the Text widget will be displayed. Otherwise, an empty Container widget will be rendered.

Switch-case statements: You can also use switch-case statements to conditionally render widgets based on a certain value. For example:
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switch (value) {
case 'option1':
return Text('This is option 1');
case 'option2':
return Text('This is option 2');
default:
return Container();
}
In this example, if the value variable is equal to 'option1', the first Text widget will be displayed. If it's equal to 'option2', the second Text widget will be displayed. Otherwise, an empty Container widget will be rendered.

Conditional expressions: You can also use conditional expressions to conditionally render widgets. For example:
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return condition ? Text('This text will be shown if the condition is true') : Container();
In this example, if the condition variable is true, the Text widget will be displayed. Otherwise, an empty Container widget will be rendered.

Overall, Flutter provides various techniques to conditionally render widgets based on certain conditions, allowing you to build dynamic and flexible user interfaces.