operators.dart

void main() {
 // declaring two numbers 
 int num1=10;
 int num2=3;
 
 // performing arithmetic calculation
 int sum=num1+num2;       // addition
 int diff=num1-num2;      // subtraction
 int unaryMinus = -num1;    // unary minus  
 int mul=num1*num2;       // multiplication
 double div=num1/num2;    // division
 int div2 =num1~/num2;     // integer division
 int mod=num1%num2;       // show remainder
 
//Printing info 
 print("The addition is $sum.");
 print("The subtraction is $diff.");
 print("The unary minus is $unaryMinus.");
 print("The multiplication is $mul.");
 print("The division is $div.");
 print("The integer division is $div2.");
 print("The modulus is $mod."); 


int userid = 123;
    int userpin = 456;

    // Printing Info
    print((userid == 123) && (userpin== 456)); // print true
    print((userid == 1213) && (userpin== 456)); // print false.
    print((userid == 123) || (userpin== 456)); // print true.
    print((userid == 1213) || (userpin== 456)); // print true
    print((userid == 123) != (userpin== 456));//print false


  int age = 10;
  
  // print(value1 is String);
  // print(age is !int);

  
 //printing info
 print(num1==num2); 
 print(num1<num2);
 print(num1>num2);
 print(num1<=num2);
 print(num1>=num2);


  // Increment and Decrement Operators
  age+= 1;  // Here age+=1 means age = age + 1.
  print("After Addition Age is $age");
  age-= 1;  //Here age-=1 means age = age - 1.
  print("After Subtraction Age is $age");
  age*= 2;  //Here age*=2 means age = age * 2.
  print("After Multiplication Age is $age");
  // age/= 2;  //Here age/=2 means age = age / 2.
  print("After Division Age is $age");

num2 = ++num1;
print("The value of num2 is $num2");

// reset value to 0 
num1 = 0;
num2 = 0;

// post increment  
num2 =  num1++;
print("The value of num2 is $num2");  



}