題目連結：
思考邏輯：
1.總共有n個數字，
2.每個數字都要乘上x
3.塞進z陣列
解法：
function countBy(x, n) {
let z = [];
for (let i=1; i<=n ;i++){
z.push(x*i)
}
return z;
}
#javascript #Codewars
1.總共有n個數字，
2.每個數字都要乘上x
3.塞進z陣列
function countBy(x, n) {
let z = [];
for (let i=1; i<=n ;i++){
z.push(x*i)
}
return z;
}
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