Right Triangle Pattern in Javascript

// Right Triangle Pattern in Javascript......

function RightTriangle(n){
let str=''
for(let i=0;i<n;i++){
for(let j=0;j<n;j++){
if(n-i-1>j)
{
str+=' '
}else{
str+='*'
}

}
str+='\n'

}
return str

}

console.log(RightTriangle(5))