# HackerRank For loop solution in c++ programming

In this HackerRank For Loop problem solution in the c++ programming language, 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.

## HackerRank For loop problem solution in c++ programming.

```#include <iostream>
#include <cstdio>
#include<bits/stdc++.h>
using namespace std;
int main()
{
int a,b;
string c[]={"","one","two","three","four","five","six","seven","eight","nine"};
cin>>a>>b;
for(int i=a;i<=b;i++)
cout<<((i<=9)?c[i]:((i%2==0)?"even":"odd"))<<endl;
}```

## Second solution

```#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;

int main() {

int a, b;
string represent = {"zero", "one", "two", "three", "four",\
"five", "six", "seven", "eight", "nine"};
cin >> a >> b;
for(int i = a; i <= b; i++) {

if(i > 9) {
if(i % 2 == 0)
cout << "even\n";
else cout << "odd\n";
}
else {
cout << represent[i]<<endl;
}
}
return 0;
}```