用scala写99乘法表

for {x<- 1 to 9y<- 1 to x} {print(s"$y*$x=${x*y}\t")if(x==y) println()}

for {x<- 1 to 9y<- 1 to x} {print(s"$y*$x=${x*y}${if(x==y) "\n" else "\t" }")}

for(x<- 1 to 9;y<- 1 to x )print(s"$y*$x=${x*y}${if(x==y) "\n" else "\t"}")