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C#•3y ago

arry with loops

how to Check if the array is equal. Two arrays are equal if their sizes are same, and elements with same index from both arrays are same.  Display both arrays.  Display if the array is equal or not equal. no one was able to answer this question any help (edited)

46 Replies

hercules_x_xOP•3y ago

yes its in my uni and need to do it with loop no one was able to answe it the teacher said set your own arry value array*

hercules_x_xOP•3y ago

this is the full q

hercules_x_xOP•3y ago

from the array it self like the length count so array from 0 but the value in it start from 1

mtreit•3y ago

Do you know how to get the length?

hercules_x_xOP•3y ago

int[,] arr = ( (1, 2, 3), (4, 5, 6 ), ( 7, 8, 9} }; for example this got 2 array Right ? 0 1 2 yes i know

MODiX•3y ago

Diddy#2634

REPL Result: Success

int[] arr1 = new int[] { 1, 2, 3};
Console.WriteLine(arr1.Length);

int[] arr1 = new int[] { 1, 2, 3};
Console.WriteLine(arr1.Length);

Console Output

Compile: 587.518ms | Execution: 64.545ms | React with ❌ to remove this embed.

hercules_x_xOP•3y ago

this one i dont know i don’t know how to compare vvalues

mtreit•3y ago

Are you actually trying to do this for multi-dimensional arrays?

hercules_x_xOP•3y ago

Maybe i can declare tow array then loop them? if(int x= 5; ) wait wait let me try shit i give up oh yaaaaa yes yes

MODiX•3y ago

Diddy#2634

REPL Result: Success

int x = 5;
if (x == 5) Console.WriteLine("Equal!");

int x = 5;
if (x == 5) Console.WriteLine("Equal!");

Console Output

Equal!

Equal!

Compile: 582.625ms | Execution: 33.080ms | React with ❌ to remove this embed.

hercules_x_xOP•3y ago

let me try First i will declare toe arrays then i will do the calculation u ask me wait please but i am confused there is tow type of array which one i declare

mtreit•3y ago

What do you mean exactly?

hercules_x_xOP•3y ago

type 1.....int[,] arr = new int[,]{{1,2,3},{4,5,6},{7,8,9}}; type2...• int[] arr = new int[5]{ 10, 20, 30, 40, 50 }; how i knows in he future if he want the first type? 2d array?

mtreit•3y ago

Multi-dimensional arrays are kind of special purpose - like for defining a grid or matrix. Most uses of arrays are the single dimensional kind.

hercules_x_xOP•3y ago

int[] arr = { 10, 20, 30, 40, 50 }; int[] arr1 = { 5, 22, 63, 70, 80 }; if(arr == arr1) System.Console.WriteLine("they are equal"); else { System.Console.WriteLine("they are not equal"); }

hercules_x_xOP•3y ago

this better

Kouhai•3y ago

Unfortunately this way of checking array content's equality wouldn't work in c#

hercules_x_xOP•3y ago

i am using Visual Studio then how to make it work in c# ohhhh yes in this uni must Visual studio code i had long dilemma with the teacher end up his winning and my lost lol hmmm i am confused how to do thta that yes ohhhh so array cant because not specific number yes there is arr.length ? but how to cod it nicely OhNo

OhNo

me try

hercules_x_xOP•3y ago

like that?

hercules_x_xOP•3y ago

feels wrong

hercules_x_xOP•3y ago

i try this too

hercules_x_xOP•3y ago

but obviously wrong hard OhNo

OhNo

Kouhai•3y ago

In an if statement you'll do (expression) == (expression) expression here can be any value or variable So the first expression you have is arr=arr.Length second expression arr1=arr1.Length What these expressions mean They mean assign arr.Length to arr and assign arr1.Length to arr1 That obviously wouldn't work because 1- arr1 and arr1.Length have different types 2- the expressions can't be compared

hercules_x_xOP•3y ago

i am just a little confused now lol then how

hercules_x_xOP•3y ago

now?

hercules_x_xOP•3y ago

it must be this Visual headache i kill u slowly program

hercules_x_xOP•3y ago

hercules_x_xOP•3y ago

if {} ? so if can be () and {} what is the difference ? i notice for loop (FOR) always ()

hercules_x_xOP•3y ago

like this

hercules_x_xOP•3y ago

ok ok noted and elements with same index from both arrays are same. what is that i don’t understand index, ohhhhh i have an idea yea so in q want me to delete. i didn’t know that the rest of the q yes i am trying

MODiX•3y ago

Diddy#2634

REPL Result: Success

int[] arr = { 10, 20, 30, 40, 50 };

int value = arr[1]; // 2nd element in array since arrays start at 0

Console.WriteLine(value);

int[] arr = { 10, 20, 30, 40, 50 };

int value = arr[1]; // 2nd element in array since arrays start at 0

Console.WriteLine(value);

Console Output

Compile: 573.979ms | Execution: 64.356ms | React with ❌ to remove this embed.

hercules_x_xOP•3y ago

is this real person ? ok following u if ? if(arr[0] ==arr1[0]); ? heheh u are amazing teacher ok ohhh yea yea then how for(int a=0; a=<5; a++) yes sooo ok for(arr[,]=0; arr[,]=>....... i can’t figure the rest nested loop ?

MODiX•3y ago

Diddy#2634

REPL Result: Success

// Has 5 elements
int[] arr = { 10, 20, 30, 40, 50 };

// You could replace the 5 here with the array length??
for (int i = 0; i < 5; i++)
{
    Console.WriteLine($"Array[{i}] = {arr[i]}");
}

// Has 5 elements
int[] arr = { 10, 20, 30, 40, 50 };

// You could replace the 5 here with the array length??
for (int i = 0; i < 5; i++)
{
    Console.WriteLine($"Array[{i}] = {arr[i]}");
}

Console Output

Array[0] = 10
Array[1] = 20
Array[2] = 30
Array[3] = 40
Array[4] = 50

Array[0] = 10
Array[1] = 20
Array[2] = 30
Array[3] = 40
Array[4] = 50

Compile: 648.189ms | Execution: 73.027ms | React with ❌ to remove this embed.

mtreit•3y ago

Can you write this exact same loop but make it go as many times as there are items in the array?

hercules_x_xOP•3y ago

why $

MODiX•3y ago

Diddy#2634

REPL Result: Success

// Has 5 elements
int[] arr = { 10, 20, 30, 40, 50 };

// You could replace the 5 here with the array length??
for (int i = 0; i < 5; i++)
{
    var currentIndex = i;
    var currentArrayValue = arr[i];
    Console.WriteLine($"Array[{currentIndex}] = {currentArrayValue}");
}

// Has 5 elements
int[] arr = { 10, 20, 30, 40, 50 };

// You could replace the 5 here with the array length??
for (int i = 0; i < 5; i++)
{
    var currentIndex = i;
    var currentArrayValue = arr[i];
    Console.WriteLine($"Array[{currentIndex}] = {currentArrayValue}");
}

Console Output

Array[0] = 10
Array[1] = 20
Array[2] = 30
Array[3] = 40
Array[4] = 50

Array[0] = 10
Array[1] = 20
Array[2] = 30
Array[3] = 40
Array[4] = 50

Compile: 723.539ms | Execution: 72.182ms | React with ❌ to remove this embed.

hercules_x_xOP•3y ago

i will try this i dont understand what he mean put the last index number hmmm how ya lol arr.lengthlast arr.lenght-1

mtreit•3y ago

Oh your loop I commented on isn't actually correct =< Thats not a thing Just use <

hercules_x_xOP•3y ago

so for(arr[] < arr.length-1 ? or just follow this lol for(i=0; i=>arr.length-1; i++) var currentIndex = i; var currentArrayValue = arr[i]; ok i am officially lost can just explain this to me

mtreit•3y ago

You need to study how for loops work And learn what operators are valid => is not a valid operator in a for loop You want the less than operator

hercules_x_xOP•3y ago

<= i mean this

mtreit•3y ago

Yes that's better Although we usually do: i < arr.Length instead of i <= arr.Length - 1

hercules_x_xOP•3y ago

ohhhh yesss

hercules_x_xOP•3y ago

Finally

hercules_x_xOP•3y ago

thanks for everything

Kouhai•3y ago

You're still not checking whether they are equal or not.

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