For loop Help!!

[fivestar]

I need help with printing this array. Also, a brief explanation of the for loop would be helpful.

  #include <iostream>
using namespace std;

int main() {
	
	int grades[5] = {6,3,2,5,7};

	for (int g = 1; g <= 5; g++) {
		cout << grades[g] << endl;
	}
	
	system("pause");
	return 0;
}

[48T7M4Gy]

for(int g = 0; g < 5 ... etc because the first element of the array is grades[0]

grades[5] is outside the range of grades you defined in line 6 and will just be a junk number, whatever is in uncontrolled memory at the time.

Check the tutorials on this site for an explanation of how the for loop works.

[Arslan7041]

Arrays start at index 0, and go up to index SIZE-1. Meaning, if you declare an array of size 5, the indices of that array go from 0 to 4.

There are two mistakes in your for-loop:
(1) You are starting at 1, and therefore completely skipping over grades[0]
(2) You loop up to and including 5, and are therefore trying to access grades[5] which I already explained does NOT exist. It is out of the bounds of the array.

Your for-loop should look like this:

	
    for (int g = 0; g < 5; g++) {
		cout << grades[g] << endl;
	}

Notice that it starts at g=0, and goes up to g<5 i.e. it will stop at g=4.

This will print the entire array from grades[0] to grades[4].

[fivestar]

Thanks a lot