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Boolean in Dart #

Let’s understand this using life example. In school life we have seen True/False kind of question, where we have to tell weather the statement is true or false.

Boolean came from there only. Boolean is used of that kind of purpose only. Whenever you need answer in True/False then we use boolean.

Boolean data can have at most two possible values.

  1. true
  2. false

In dart boolean is refer as bool

How to declare and assign value of bool #

main.dart
void main(){
    bool aa = true; // Assign value while declaring the variable
    
    bool yy ;       // declare a variable
    yy = false;     // let's assign some value to variable

    print(ans);
    print(yy);

    aa = false;     // update value of bool type
    print(aa);      
}

Real Example #

main.dart
void main(){
    int a = 10;
    int b = 20;
    boole answer = a < b;   // Yes, A is less than B
    print(answer);          // We will get true in console
}