Illegal use of reserved keyword "while"

Hello,

please. This code working for me, but if my friend copy-paste this code he everytime get error: "Illegal use of reserved keyword "while".

You don't know where can be problem?

Code:

while 1
    y = fix(input('Zadajte stlpce'));
    if(y>=3 & y<=7)
        break;
    end
end
 
% Príkazom input načítam hodnoty a fix oddelí čísla za čiarkou.
 
while 1
    x = fix(input('Zadajte riadky'));
    if(x>=3 & x<=7)
        break;
    end
end
 
while 1 
    krok = fix(input('Krok'));
    if(krok>=3 & krok<=7)
        break;
    end
end
 
V = zeros(x,y);
V(:) = 1;
% Vytvorila sa matica s nulami a V(:) ju vyplní jednotkami. 
val = 1;
for Riadok = 1:y
    for Stlpec = 1:x
        if(val == krok)
            V(Stlpec,Riadok) = Riadok+Stlpec;
            V(1,1) = V(1,1) * V(Stlpec,Riadok);
            val = 1;
        else
            val = val + 1;
        end
    end
end
% Val pomáha počítať k-tú hodnotu. Ak sa val==krok tak sa zapíše spočítaný
% riadok + stlpec a zapíše sa na dané súradnice. Potom sa urobí súčin
% daného čísla na prvý prvok. 
V
% Vypíše sa matica.

[Walter Roberson]

The code looks okay. The error is with something that the other person already has in the file before that point, or if they are already inside a statement at the command line. If they are at the command line, they should press control-C to end whatever they are already doing.

[Image Analyst]

Have them type control-a (to select everything) then control-i (to properly indent). Does the indentation look OK after that, or are there statements that are misaligned, like maybe you're missing an "end" statement or something.