1. Introduction to Algorithms and Programming COMP151
LAB 5
If & If-else statements
Introduction to Algorithms and Programming COMP151

2. Exercise 1:
Write a program to check if the entered number by the user is even or odd.

3. #include<iostream>
using namespace std;
int main() {
int number,r;
cout<<"Enter the value for number"<<endl;
cin>>number;
r=number%2;
if(r==0)
cout<<"The given number is even"<<endl; }
else
cout<<"The given number is odd"<<endl;
return(0);

4. Exercise 2:
Write a program to check if the entered number by the user is positive or negative or zero.

5. #include<iostream>
using namespace std;
int main() {
float number;
cout<<"Enter the Value for Number"<<endl;
cin>>number;
if(number>0)
cout<<"The given number is Positive"<<endl; }
else
If (number <0)
cout<<"The given number is Negative"<<endl;
cout<<"The given number Zero"<<endl;
return(0);

6. Exercise 3:
Write a program to check if the entered letter is vowel or not.

7. #include<iostream>
using namespace std;
int main() {
char letter;
cout<<"Enter the character"<<endl;
cin>>letter;
if((letter=='a')||(letter=='A')||(letter=='e')||
(letter=='E')||(letter=='i')||(letter=='I')||
(letter=='o')||(letter=='O')||(letter=='u')||
(letter=='U'))
cout<<"The given character is Vowel"<<endl; }
else
cout<<"The given character is not vowel"<<endl;
return(0);

8. Exercise 3:
Write a program to check if the Triangle is valid or not

9. #include<iostream>
using namespace std;
int main() {
float a, b, c, sum;
cout<<"Enter the value of the three angles"<<endl;
cin>>a>>b>>c;
Sum= a+b+c;
If (sum ==180)
cout<<"The given triangle is valid"<<endl;
else
cout<<"The given triangle is not valid"<<endl;
return(0); }