i want a programme to approximate decimal to number

i want a programme to approximate decimal to number

EX:

if I have 2.1 or 2.3 or 2.3 or 2.4

I want the answer to be 2

and if i have 2.5 till to 2.9

I want the answer to be 3

but the number is variable

I mean (2) can be 1,2,3,4,.....and so on

any number i can enter it

Answer 1

[the cyclist]

Do you just need the round() function?

>> round(2.3)

ans = 

     2

[karim]

can it be like a program me i wanna a lot of orders

[Image Analyst]

Yes. You can have your number in a variable and put this line in your code:

roundedNumber = round(yourVariable);

[karim]

can you write it completely

[Walter Roberson]

yourVariable = 2.3;
roundedNumber = round(yourVariable);

or perhaps you want something like

function r = myround(x)
  r = round(x);
end

and then

myround(2.3)

[karim]

it doesn't work

??? Input argument "x" is undefined.

Error in ==> Untitled at 2 r = round(x);

[Jan]

It does work, if you copy the code completely.

[karim]

this code yourVariable = 2.3; roundedNumber = round(yourVariable);

is working

can i input 2.3 manually

i mean

when i click run from my m -file

the program e tell me to enter my variable then i enter it and get the result is (answer)

[Walter Roberson]

myround( input('Enter number to be rounded') )

[karim]

Thanks i solve it

yourVariable=input('yourVariable=');
roundedNumber = round(yourVariable)

But i want to know also

how this code working

function r = myround(x)
  r = round(x);
end

and then

myround(2.3)

[Jan]

@Karim: Here the code is saved to a "function". The Getting Started chapters of the documentation explain the using of functions exhaustively, such that it is recommended to read them. It is not the job of the forum to repeat the basics, when all required information are found in the docs already.