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mirror of https://github.com/adambard/learnxinyminutes-docs.git synced 2025-08-19 13:02:14 +02:00

Merge branch 'master' into dart-formatting

This commit is contained in:
Divay Prakash
2020-01-24 20:02:22 +05:30
committed by GitHub
72 changed files with 6527 additions and 2555 deletions

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@@ -536,6 +536,44 @@ example30() {
}
}
// Optional Positional Parameter:
// parameter will be disclosed with square bracket [ ] & square bracketed parameter are optional.
example31() {
findVolume31(int length, int breath, [int height]) {
print('length = $length, breath = $breath, height = $height');
}
findVolume31(10,20,30); //valid
findVolume31(10,20); //also valid
}
// Optional Named Parameter:
// parameter will be disclosed with curly bracket { }
// curly bracketed parameter are optional.
// have to use parameter name to assign a value which separated with colan :
// in curly bracketed parameter order does not matter
// these type parameter help us to avoid confusion while passing value for a function which has many parameter.
example32() {
findVolume32(int length, int breath, {int height}) {
print('length = $length, breath = $breath, height = $height');
}
findVolume32(10,20,height:30);//valid & we can see the parameter name is mentioned here.
findVolume32(10,20);//also valid
}
// Optional Default Parameter:
// same like optional named parameter in addition we can assign default value for this parameter.
// which means no value is passed this default value will be taken.
example33() {
findVolume33(int length, int breath, {int height=10}) {
print('length = $length, breath = $breath, height = $height');
}
findVolume33(10,20,height:30);//valid
findVolume33(10,20);//valid
}
// Programs have only one entry point in the main function.
// Nothing is expected to be executed on the outer scope before a program
// starts running with what's in its main function.
@@ -562,6 +600,3 @@ Dart has a comprehensive web-site. It covers API reference, tutorials, articles
useful Try Dart online.
[https://www.dartlang.org](https://www.dartlang.org)
[https://try.dartlang.org](https://try.dartlang.org)