\\ Repeat a string str the specified number of times ntimes and return composed string.
\\ 3/3/2016 aev
srepeat(str,ntimes)={
my(srez=str,nt=ntimes-1);
if(ntimes<1||#str==0,return(""));
if(ntimes==1,return(str));
for(i=1,nt, srez=concat(srez,str));
return(srez);
}

{
\\ TESTS
print(" *** Testing srepeat:");
print("1.",srepeat("a",5));
print("2.",srepeat("ab",5));
print("3.",srepeat("c",1));
print("4.|",srepeat("d",0),"|");
print("5.|",srepeat("",5),"|");
print1("6."); for(i=1,10000000, srepeat("e",10));
}