分别用while语句、do-while语句、for语句编写程序,计算e=1+1/1!+1/2!+...+1/n
时间: 2024-04-27 18:15:32 浏览: 14
以下是三种不同语句实现计算e的程序:
1. while语句实现:
```python
n = 20
e = 1
i = 1
factorial = 1
while i <= n:
factorial *= i
e += 1 / factorial
i += 1
print("e =", e)
```
2. do-while语句实现:
```python
n = 20
e = 1
i = 1
factorial = 1
while True:
factorial *= i
e += 1 / factorial
i += 1
if i > n:
break
print("e =", e)
```
3. for语句实现:
```python
n = 20
e = 1
factorial = 1
for i in range(1, n+1):
factorial *= i
e += 1 / factorial
print("e =", e)
```
相关问题
c语言-分别用while语句、do-while语句、for语句编写程序,计算e = 1+1/1!+1/2!+...+1/n!
以下是三种C语言计算e的程序,分别使用while语句、do-while语句、for语句实现:
1.使用while语句实现:
```c
#include <stdio.h>
int main() {
int n = 20, i = 1;
double sum = 1, a = 1;
while (i <= n {
a *= i;
sum += 1.0 / a;
i++;
}
printf("e = %lf\n", sum);
return 0;
}
```
2.使用do-while语句实现:
```c
#include <stdio.h>
int main() {
int n = 20, i = 1;
double sum = 1, a = 1;
do {
a *= i;
sum += 1.0 / a;
i++;
} while (i <= n);
printf("e = %lf\n", sum);
return 0;
}
```
3.使用for语句实现:
```c
#include <stdio.h>
int main() {
int n = 20;
double sum = 1, a = 1;
for (int i = 1; i <= n; i++) {
a *= i;
sum += 1.0 / a;
}
printf("e = %lf\n", sum);
return 0;
}
```
分别用while语句、do-while语句、for语句编写程序,计算e≈1+1/1!+1/2!+...+1/n!
使用while语句计算e≈1+1/1!+1/2!+...+1/n!的代码如下所示:
```java
int n = 20;
double sum = 1.0, number = 1.0;
int i = 1;
while (i <= n) {
number /= i;
sum += number;
i++;
}
System.out.println("使用while循环计算的e≈" + sum);
```
使用do-while语句计算e≈1+1/1!+1/2!+...+1/n!的代码如下所示:
```java
int n = 20;
double sum = 1.0, number = 1.0;
int i = 1;
do {
number /= i;
sum += number;
i++;
} while (i <= n);
System.out.println("使用do-while循环计算的e≈" + sum);
```
使用for语句计算e≈1+1/1!+1/2!+...+1/n!的代码如下所示:
```java
int n = 20;
double sum = 1.0, number = 1.0;
for (int i = 1; i <= n; i++) {
number /= i;
sum += number;
}
System.out.println("使用for循环计算的e≈" + sum);
```