read second value in array in for loop

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2.00/5 (2 votes)

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can you help me to read the second value in array
i mean :
int [] marks = new int[5] { 99, 98, 92, 97, 95};
int [] marks1 = new int[5] { 13, 19, 5, 4, 2};
int [] marks2 = new int[5] { 9, 1, 17, 288, 14};
I want read just the second value from those arrays : 98 , 19 , 1
and put it in a new array how i can do it ? in for loop i mean
thank you .

Posted 7-Jun-15 23:04pm

Jerji Rani

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Comments

[no name] 8-Jun-15 5:17am

u just call the index of mark[1],mark1[2],etc

Matt T Heffron 8-Jun-15 12:18pm

Don't you mean:
mark[1], ...

[no name] 8-Jun-15 23:55pm

Yupz :)

Matt T Heffron 8-Jun-15 12:17pm

This is pretty clearly only part of what you really are trying to accomplish...
If you can describe simply what the whole task is, then you may get even better advice than the two (pretty good) solutions, below.

2 solutions

Solution 1

Why would you need a for loop?

C#

var result = new [] {marks[1],marks1[1],marks2[1]};

Edit
If you had the arrays in an array like this:

C#

var marksArray = new [] {marks, marks1, marks2};

Then you could use LINQ to create the result array:

C#

var result2 = marksArray.Select(x => x[1]).ToArray();

Using for-loop is just too much work.

Posted 7-Jun-15 23:18pm

Tomas Takac

Updated 7-Jun-15 23:21pm

v2

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Afzaal Ahmad Zeeshan · Accepted Answer · 2015-06-07T23:18:00

In my opinion, getting the values from the array would be a very much good idea, like this,

C#

int[] arr = { marks[1], marks1[1], marks2[1] };

Enough. It would have an array of 3 elements having the value of second element in those three arrays.

Otherwise, if you want to get the values using the loop. You would write the loop and get the value using the index variable. But, remember, you only want one value so do not waste CPU cycles on extra loops. Write it this way,

C#

int a = 0;
for (int i = 1; i < 2; i++ ) { a = marks[i]; }

The above loop would run only once, because in the first time the condition would be true, then it would be false so after getting the value at index 1 (element 2) it would break. Write it this way,

C#

int[] arr = { 0, 0, 0 }; // arbitrary data (not required)

for (int i = 1; i < 2; i++) { arr[0] = marks[1]; }
for (int i = 1; i < 2; i++) { arr[1] = marks1[1]; }
for (int i = 1; i < 2; i++) { arr[2] = marks2[1]; }

// Possible value would be
{ 98, 19, 1 }

There you go.