接受提示数字输入+打印字符串
Accept prompt number input + print String
我正在尝试使用数字创建字符串输出。
用户输入一个数字+输出对应的字符串
我的代码似乎不正确 + 还有没有办法使用 for/while 循环来使它更整洁?
//Single input
let num = prompt("Please enter a number");
//Comparing if
if (num === 1)
{
console.log("Mon");
}
else if (num === 2)
{
console.log ("Tue");
}
else if (num === 3)
{
console.log ("Wedn");
}
else if (num === 4)
{
console.log ("Thurs");
}
else if (num === 5)
{
console.log ("Frid");
}
else if (num === 6)
{
console.log ("Satu");
}
else if (num === 7)
{
console.log ("Sund");
}
let num = prompt("Please enter a number");
returns 字符串,不是数字,你必须转换结果到编号。
一种方法:
let num = +prompt("Please enter a number"); // note the plus sign before prompt
或
let num = parseInt(prompt("Please enter a number"));
//Single input
let num = +prompt("Please enter a number");
//Comparing if
if (num === 1)
{
console.log("Mon");
}
else if (num === 2)
{
console.log ("Tue");
}
else if (num === 3)
{
console.log ("Wedn");
}
else if (num === 4)
{
console.log ("Thurs");
}
else if (num === 5)
{
console.log ("Frid");
}
else if (num === 6)
{
console.log ("Satu");
}
else if (num === 7)
{
console.log ("Sund");
}
关于使它更整洁?
const daysOfTheWeek = ["Mon", "Tue", "Wedn", "Thurs", "Frid", "Satu", "Sund"];
const day = +prompt("Please enter a number");
if(day > 0 && day <= daysOfTheWeek.length){
console.log(daysOfTheWeek[day - 1]);
} else {
console.log("No such day");
}
更简洁的方法是使用地图查找给定数字的日期。例如
let days = {
1: "Mon",
2: "Tue",
3: "Wed",
4: "Thur",
5: "Fri",
6: "Sat",
7: "Sun",
}
let num = prompt("Please enter a number");
console.log(days[num])
我正在尝试使用数字创建字符串输出。 用户输入一个数字+输出对应的字符串
我的代码似乎不正确 + 还有没有办法使用 for/while 循环来使它更整洁?
//Single input
let num = prompt("Please enter a number");
//Comparing if
if (num === 1)
{
console.log("Mon");
}
else if (num === 2)
{
console.log ("Tue");
}
else if (num === 3)
{
console.log ("Wedn");
}
else if (num === 4)
{
console.log ("Thurs");
}
else if (num === 5)
{
console.log ("Frid");
}
else if (num === 6)
{
console.log ("Satu");
}
else if (num === 7)
{
console.log ("Sund");
}
let num = prompt("Please enter a number");
returns 字符串,不是数字,你必须转换结果到编号。
一种方法:
let num = +prompt("Please enter a number"); // note the plus sign before prompt
或
let num = parseInt(prompt("Please enter a number"));
//Single input
let num = +prompt("Please enter a number");
//Comparing if
if (num === 1)
{
console.log("Mon");
}
else if (num === 2)
{
console.log ("Tue");
}
else if (num === 3)
{
console.log ("Wedn");
}
else if (num === 4)
{
console.log ("Thurs");
}
else if (num === 5)
{
console.log ("Frid");
}
else if (num === 6)
{
console.log ("Satu");
}
else if (num === 7)
{
console.log ("Sund");
}
关于使它更整洁?
const daysOfTheWeek = ["Mon", "Tue", "Wedn", "Thurs", "Frid", "Satu", "Sund"];
const day = +prompt("Please enter a number");
if(day > 0 && day <= daysOfTheWeek.length){
console.log(daysOfTheWeek[day - 1]);
} else {
console.log("No such day");
}
更简洁的方法是使用地图查找给定数字的日期。例如
let days = {
1: "Mon",
2: "Tue",
3: "Wed",
4: "Thur",
5: "Fri",
6: "Sat",
7: "Sun",
}
let num = prompt("Please enter a number");
console.log(days[num])