程序應該要求用戶輸入一個正整數(shù)并打印一個階乘表。如果輸入小于 0，輸出或程序應該停止。給我一個正整數(shù)：5輸出：5！= 5 x 4 x 3 x 2 x 15 的階乘是 120給我一個正整數(shù)：-5輸出：無效輸入！程序停止ps：我是初學者。我正在使用 Netbean IDE
2 回答
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TA貢獻1836條經(jīng)驗 獲得超13個贊
這應該有效。只需循環(huán)數(shù)字。
var input = prompt("What number would you like me to give you the factorial of?");
if (input > 0) {
var answer = 1;
var string = input + " =";
for (var i = input; i >= 1; i--) {
answer *= i;
string += " " + i
if (i != 1) {
string += " x"
}
}
console.log(string)
console.log("The factorial of " + input + " is " + answer)
} else {console.log("Invalid input! Program stopped.")}
Java（假設輸入在變量中input）：
if (input > 0) {
int answer = 1;
String stringAnswer = input + " =";
for (int i = input; i >= 1; i--) {
answer *= i;
stringAnswer += " " + i
if (i != 1) {
stringAnswer += " x"
}
}
System.out.println(stringAnswer)
System.out.println("The factorial of " + input + " is " + answer)
} else {System.out.println("Invalid input! Program stopped.")}
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TA貢獻1831條經(jīng)驗 獲得超4個贊
您可以檢查數(shù)字是否小于 0 否則計算階乘
let x = prompt('Please enter a positive integer');
if (x < 0) {
console.log('invalid Input! Programmed Stop')
} else {
let val = 1;
for (let k = 1; k <= x; k++) {
val *= k
}
console.log(val)
}
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