How to use a Ternary Operator with multiple condition in flutter dart?

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how to use ternary if else with two or more condition using "OR" and "AND" like

    if(foo == 1 || foo == 2)
     {
      do something
      }
     {
      else do something
      } 

i want to use it like

  foo == 1 || foo == 2 ? doSomething : doSomething

If you're referring to else if statements in dart, then this ternary operator:

(foo==1)?something1():(foo==2)? something2():(foo==3)? something3(): something4();

is equivalent to this:

if(foo ==1){
    something1();
}
elseif(foo ==2){
    something2();
}
elseif(foo ==3){
    something3();
}
else something4();

Simple And Bug-Free Code With Dart Operators, ? (statement if true) : (statement if false); If there is assignment involved, return needs to be added at only the start and not the individual statements. Ternary operator works on condition and returns result in True False Boolean format. If the condition is True then it will execute the first code block and if the condition is false then it will execute the second code block. Ternary operator takes 3 arguments and based upon first argument it will returns us True and False by comparing condition passed in first argument.

Try below

(2 > 3)?print("It is more than 3"):print("It is less than 3");
////Prints It is less than 3 to the console

Dart If Else Statement - FlutterRDart, is a symbol that tells the compiler to perform a specific mathematical, relational, or logical operation and produce a final result. Here are some examples of how I use Dart’s ternary operator syntax in Flutter code: // as a flutter widget property subtitle: _notificationsAreEnabled ? Text('ON') : Text('OFF'), Color _rowBgColor(int rowNum) { return rowNum % 2 == 0 ?

For three conditions use:

value: (i == 1) ? 1 : (i == 2) ? 2 : 0

Operators in Dart - Jay Tillu, Dart if else statement checks a condition in the if part and executes the program based on the result of the condition Flutter UI · Flutter Widget · Flutter Admob · Flutter Firebase · Dart Tutorials We can use these conditional statements to perform different action. Single line if statement (Ternary Operator). We can use these conditional statements to perform different action. Dart offers various condition statements. if Given condition holds true then the defined if code block is executed. else code block to be executed if the same condition is false; else if when there are more conditions and anyone of them can be true. Let’s say the first

it is easy,

if(foo == 1 || foo == 2)
 {
  do something
  }
 {
  else do something
  } 

it can be written thus for OR statement

foo==1 || foo==2 ? do something : else do something

it can be written thus for AND statement

foo==1 && foo==2 ? do something : else do something

both will work perfectly

Dart If Else Statement, #4.2 Dart Conditional Expressions: Ternary Operator of Java. In this beginner tutorial Duration: 6:22 Posted: Jun 20, 2018 Now the Dart ternary operator is actually just a bit … of what we call syntatic sugar to make something … that's actually very long and very wordy, … say an if condition is true, then do this, else do this. … And there's a lot of brackets, there's a lot of key words … and there's a lot of lines of code to achieve this. …

The cleaner way for me is

if ({1, 2}.contains(foo)) {
  //do something
} else {
  //do something else
}

#4.2 Dart Conditional Expressions: Ternary Operator of Java. Dart , As a quick note, the Dart ternary operator syntax is the same as the Java examples of how I use Dart's ternary operator syntax in Flutter code:. This article is the first in a series of articles dedicated to understanding the Dart language better and using it more efficiently. Dart(2.0+) and Flutter are both relatively new and an immense…

The Dart ternary operator syntax (examples), Press ? for keyboard navigation. ❮ Dart resources Number Guessing game ❯ ?: Ternary operator. if (COND) { X = A; } else { X = B; } X = COND ? A : B;. Index (i)  With the Flutter framework, you use the Dart programming language to create beautiful applications. (also known as a ternary operator), requires one conditional expression and two value

Ternary operator, Dart ternary operator: Flutter: Part 07 Building the UI or Flutter: Part 07 that's actually very long and very wordy, … say an if condition is true,  Switch case is used to execute large conditions code with single data and as per condition execute a fix block of code. So in this tutorial we would Use Switch Case Conditional Statement in Dart Flutter Android iOS Example Tutorial. Contents in this project Use Switch Case Conditional Statement in Dart Flutter Android iOS Example Tutorial: 1.

Dart ternary operator, Dart(2.0+) and Flutter are both relatively new and an immense… A lot of examples of code used by newer developers just use the The ternary operator already exists in most languages, but we'll discuss it here for a more complete flow. condition ? return (statement if true) : return (statement if false);  Now the Dart ternary operator is actually just a bit of what we call syntatic sugar to make something that's actually very long and very wordy, say an if condition is true, then do this, else do this.

Comments
  • Use parentheses to group expressions.
  • You can use parantheses to use logical "OR" and "AND".
  • What is the problem you are seeing? The code foo == 1 || foo == 2 ? doSomething : doSomething is valid, even without extra parentheses.
  • I would argue a slightly different point - why ternary over if/else? - Don't obfuscate the readability of your code unnecessarily.
  • You dont have to be rude and give negative vote to him. He has given the idea to use multiple ternary operator. I dont see anything wrong.