Source Code :
import 'dart:io';
void main() {
print('This is a Calculator!\n');
print('''Commands:
add => +
subtract => -
multiply => *
divide => /''');
calculation();
}
void calculation() {
stdout.writeln('First Number:');
var num1 = int.parse(stdin.readLineSync());
stdout.writeln('Second Number:');
var num2 = int.parse(stdin.readLineSync());
stdout.writeln('Command');
var comm = stdin.readLineSync();
if (comm == '+') {
num res = num1 + num2;
print('The Result is $res');
} else if (comm == '-') {
num res = num1 - num2;
print('The Result is $res');
} else if (comm == '*') {
num res = num1 * num2;
print('The Result is $res');
} else if (comm == '/') {
num res = num1 / num2;
print('The Result is $res');
} else {
print('ERROR!');
}
print('Want to continue calculation? (y/n)');
var i1 = stdin.readLineSync();
if (i1 == 'y') {
calculation();
} else {
print('Thanks for using!');
}
}
Output :
This is a Calculator! Commands: add => + subtract => - multiply => * divide => / First Number: 66 Second Number: 87 Command * The Result is 5742 Want to continue calculation? (y/n) y First Number: 5742 Second Number: 5000 Command - The Result is 742 Want to continue calculation? (y/n) n Thanks for using!
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