**
1. Program to sort 3 numbers in descending order using if-else statements
**

```
a = int(input(
"Enter first number: "
))
```

```
b = int(input(
"Enter second number: "
))
```

```
c = int(input(
"Enter third number: "
))
```

```
```

**
if
**
a>b:

```
```

**
if
**
b>c:

```
print(
"Numbers in sorted order:"
,a,
" "
,b,
" "
,c)
```

```
```

**
else
**
:

```
```

**
if
**
c>a:

```
print(
"Numbers in sorted order:"
,c,
" "
,a,
" "
,b)
```

```
```

**
else
**
:

```
print(
"Numbers in sorted order:"
,a,
" "
,c,
" "
,b)
```

```
```

**
elif
**
b>a:

```
```

**
if
**
a>c:

```
print(
"Numbers in sorted order:"
,b,
" "
,a,
" "
,c)
```

```
```

**
else
**
:

```
print(
"Numbers in sorted order:"
,b,
" "
,c,
" "
,a)
```

```
```

**
else
**
:

```
```

**
print(
"Numbers in sorted order:"
,c,
" "
,b,
" "
,a)
**

Output:

**
2. Program to generate the pattern given below by accepting the input number from user
**

```
```

**
num = int(input(
**
**
"Enter a number to generate its pattern = "
**
**
))
**

```
```

**
for i in range(
**
**
1
**
**
,num +
**
**
1
**
**
):
**

```
```

**
for j in range(
**
**
1
**
**
,i +
**
**
1
**
**
):
**

```
```

**
print(j, end =
**
**
" "
**
**
)
**

```
```

**
print()
**

Output:

**
3. Program to find sum of series
**

**
(1*1) + (2*2) + (3*3) + (4*4) + (5*5) + … + (n*n)
**

```
num = int(input(
"Enter value for n = "
))
```

```
sum=
0
```

```
```

**
for
**
i
**
in
**
range(
1
, num +
1
):

```
sum += (i * i)
```

```
```

**
print(
"Sum of series = "
,sum)
**

Output:

**
4. Program to find factorial of a given number
**

```
```

**
num = int(input(
**
**
"Enter a number: "
**
**
))
**

```
```

**
fact =
**
**
1
**

```
```

**
if num <
**
**
0
**
**
:
**

```
```

**
print(
**
**
"Sorry, factorial does not exist for negative numbers"
**
**
)
**

```
```

**
elif num ==
**
**
0
**
**
:
**

```
```

**
print(
**
**
"The factorial of 0 is 1"
**
**
)
**

```
```

**
else:
**

```
```

**
for i in range(
**
**
1
**
**
, num +
**
**
1
**
**
):
**

```
```

**
fact = fact * i
**

```
```

**
print("factorial of ", num, " is ", fact)
**

Output: