How can i make a LinQ query using where and with an int[] list?

Question

Im just starting to learn how to use LinQ, I want to only show grades that are 9 and 10 from a list i have but when trying to use var and foreach it wont let me, not sure why.

This is the list i was provided:

int[] grades= { 5, 9, 7, 8, 6, 9, 5, 7, 7, 4, 6, 10, 8 };

And here im trying to do the query:

        var grades1 = from s in grades
        where s.grades>= 9 
        select s;

        foreach (var cal in grades)
        Console.WriteLine(cal.grades);

The thing is that it shows an error when doing s.grades and cal.grades. I cant change the int[]grades.

The variable s represents an element of grades. Since grades is an int[], s is an int. So it needs to be where s >= 9. — Spencer Bench
– Spencer Bench, Commented Feb 28, 2022 at 22:44

Peter Smith · Accepted Answer · 2022-03-01 07:21:58Z

1

The following works:

int[] grades = { 5, 9, 7, 8, 6, 9, 5, 7, 7, 4, 6, 10, 8 };
var grades1 = from s in grades
              where s >= 9
              select s;

foreach (var cal in grades1)
    Console.WriteLine(cal);

s is an int so you can't qualify it. You are selecting an int element of an array of ints

edited Mar 1, 2022 at 7:21

answered Feb 28, 2022 at 22:46

Peter Smith

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1 Comment

Ren Over a year ago

Thank you so much this helped alot! As you said the problem was with the int element

user123456 · Accepted Answer · 2022-02-28 22:46:10Z

0

try this

 int[] grades = { 5, 9, 7, 8, 6, 9, 5, 7, 7, 4, 6, 10, 8 };

var grades1 = from s in grades
              where s >= 9
              select s;

foreach (var cal in grades1)
{
    Console.WriteLine(cal);

}

answered Feb 28, 2022 at 22:46

user123456

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