Exercises

Exercise 1 :

Write a program that accepts two Strings from user : first_name and last_name and print :
Dr. last_name first_name.

Input:

Albert
Einstein

Output:

Dr. Einstein Albert

Solution:

import 'dart:io';

void main() {

print("Enter First Name : ");

var first_name = stdin.readLineSync();

print("Enter Last Nale : ");

var last_name = stdin.readLineSync();

print("Dr. " + last_name + " " + first_name);

}

Enter First Name :
Albert
Enter Last Nale :
Einstein
Dr. Einstein Albert

Exercise 2 :

Write a program that accepts three integers from user : a, b, c , create these new variables and print their value :

1) sum = a+b+c
2) mul = a*b*c
3) diff = mul - sum
4) aa=a++ (use Unary Operators)
5) bb=++b (use Unary Operators)
6) cc=--c (use Unary Operators)
7) aa=aa+bb (use Assignment Operators)
8) cc=cc-aa (use Assignment Operators)
9) d=a/(b/c)
10) check if d is of type double using is keyword.

stdin.readLineSync() read the input as a string.
To convert it to int use this function:

int.parse(stdin.readLineSync());

Solution:

import 'dart:io';

void main() {

print("Enter 3 integers : ");

var a = int.parse(stdin.readLineSync());

var b = int.parse(stdin.readLineSync());

var c = int.parse(stdin.readLineSync());

//1

var sum = a + b + c;

print(sum);

//2

var mul = a * b * c;

print(mul);

//3

var diff = mul - sum;

print(diff);

//4

var aa = a++;

print(aa);

//5

var bb = ++b;

print(bb);

//6

var cc = --c;

print(cc);

//7

aa += bb;

print(aa);

//8

cc -= aa;

print(cc);

//9

var d = a / (b / c);

print(d);

//10

print(d is double);

}

Enter 3 integers :
5
7
10
22
350
328
5
8
9
13
-4
6.75
true

Exercise 3 :

Write a program that accepts a string from user and check if the first letter and the last letter are equals then print "Equals" else print "Not equals".
Try to use Conditional Operators.

Solution:

import 'dart:io';

void main() {

var input = stdin.readLineSync();

input[0] == input[input.length - 1] ? print("Equals") : print("Not Equals");

}

ADAMA
Equals

JOHN
Not Equals

Exercise 4 :

What is the ouput of this program?

void main() {

const pi = 3.14;

int a = 5, b = -12, c = 27;

bool test1 = (c + b) % a == 0;

print(test1);

c -= 20;

bool test2 = ((c > 0) || (b > 0)) && (5 != a++);

print(test2);

bool test3 = !test1 || !test2;

print(test3);

bool test4 = ++a + --b + c++ > pi;

print(test4);

}

Solution:

true
false
true
false