# \[SOLVED\] Gas Attack Help Please
**URL:** https://discourse.codecombat.com/t/solved-gas-attack-help-please/22940
**Category:** Level Help
**Created:** [July 12, 2020, 3:17am UTC](https://discourse.codecombat.com/t/solved-gas-attack-help-please/22940 "2020-07-12T03:17:11Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@Monsty](https://discourse.codecombat.com/u/Monsty)
#### Post date: [July 12, 2020, 3:17am UTC](https://discourse.codecombat.com/t/solved-gas-attack-help-please/22940/1 "2020-07-12T03:17:11Z")
```python
// Calculate the total health of all the ogres.
function sumHealth(enemies) {
// Create a variable and set it to 0 to start the sum.
var totalHealth = 0;
// Initialize the loop index to 0
var enemyIndex = 0;
// While enemyIndex is less than the length of enemies array
while (enemyIndex < enemies.length) {
// Add the current enemy's health to totalHealth
enemies.health += totalHealth;
// Increment enemyIndex by 1.
enemyIndex += 1;
}
return totalHealth;
}
// Use the cannon to defeat the ogres.
var cannon = hero.findNearest(hero.findFriends());
// The cannon can see through the walls.
var enemies = cannon.findEnemies();
// Calculate the sum of the ogres' health.
var ogreSummaryHealth = sumHealth(enemies);
hero.say("Use " + ogreSummaryHealth + " grams.");
```
---
### Author:  [@AnSeDra](https://discourse.codecombat.com/u/AnSeDra)
#### Post date: [July 12, 2020, 3:23am UTC](https://discourse.codecombat.com/t/solved-gas-attack-help-please/22940/2 "2020-07-12T03:23:58Z")
> [@Monsty](#):
>
> `enemies.health += totalHealth;`
Instead of this, you should say that a variabile enemy is enemies[enemyIndex] and then add to totalHealth the enemy’s health.
Andrei
---
### Author:  [@system](https://discourse.codecombat.com/u/system)
#### Post date: [July 12, 2020, 3:24pm UTC](https://discourse.codecombat.com/t/solved-gas-attack-help-please/22940/3 "2020-07-12T15:24:00Z")
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