For this loop I want the output to print str='b' anytime A='1'

For this loop I want the output to print str='b' anytime A='1'

clc
clear
for q=20:21
str=[];
    A=dec2base(q,19)
    if A=='1'
        str=[str sprintf('b')]
    end
    str
end

but when A=11 the output is 'b' instead of 'bb'. Please help

Answer 1

[Rik]

This behaviour is exactly as documented. if A=='1' does not create a loop.

clc
clear
str=[];
for q=20:21
    A=dec2base(q,19);
    str_=repmat('b',1,sum(A=='1'));
    fprintf('%s results in %s\n',A,str_)
    str=[str str_];
end

11 results in bb
12 results in b

str

str = 'bbb'