Sample Task and Solution : For Loop of HackerRank

A for loop is a programming language statement which allows code to be repeatedly executed.

The syntax is

for ( <expression_1> ; <expression_2> ; <expression_3> )
    <statement>

• expression_1 is used for intializing variables which are generally used for controlling the terminating flag for the loop.
• expression_2 is used to check for the terminating condition. If this evaluates to false, then the loop is terminated.
• expression_3 is generally used to update the flags/variables.

A sample loop is

for(int i = 0; i < 10; i++) {
    ...
}

In this challenge, you will use a for loop to increment a variable through a range.

Input Format

You will be given two positive integers,  and  (), separated by a newline.

Output Format

For each integer  in the inclusive interval :

• If , then print the English representation of it in lowercase. That is "one" for , "two" for , and so on.
• Else if  and it is an even number, then print "even".
• Else if  and it is an odd number, then print "odd".

Note: 

Sample Input

8
11

Sample Output

eight
nine
even
odd

Solution

#include <iostream>

#include <cstdio>

using namespace std;

int main() {

    // Complete the code.

    string s[] = {"one", "two", "three", "four", "five", "six", "seven", "eight", "nine"};

    int a, b;

    cin >> a >> b;

   

    for(int i = a; i<=b; i++) {

        if (i<=9) {

        cout << s[i-1] << endl;

        } else if (i>9 && i%2==0) {

            cout << "even" << endl;

        } else {

            cout << "odd" << endl;

        }

    }              

    return 0

 Source : HackerRank