### 1. Write a Python program to print the following string in a specific format.

```
p='Twinkle, twinkle, little star,\n How I wonder what you are!\n Up above the world so high,\n Like a diamond in the sky.\nTwinkle, twinkle, little star,\n How I wonder what you are'
print(p)
```

Output:

```
Twinkle, twinkle, little star,
How I wonder what you are!
Up above the world so high,
Like a diamond in the sky.
Twinkle, twinkle, little star,
How I wonder what you are
```

### 2. Write a Python program that read a string from a user and print the sting in double quotation marks.

```
str=input("Enter a string= ")
print('""',str,'""')
```

Output:

Enter a string= I Am Coding Lover

“” I Am Coding Lover “”

### 3. Write a Python program which accepts the radius of a circle from the user and compute the area.

```
r=int(input("Enter radius of circle= "))
area= 22/7*(r*r)
print("Area of Circle= ", area, "sq")
```

Output:

Enter radius of circle= 6

Area of Circle= 113.14285714285714 sq

### 4. Write a Python program that will accept the base and height of a triangle and compute the area.

```
b=int(input("Enter base of triangle= "))
h=int(input("Enter height of triangle= "))
area= 1/2*b*h
print("Area of Triangle= ", area)
```

Output:

Enter base of triangle= 4

Enter height of triangle= 6

Area of Triangle= 12.0

### 5. Write a Python program to perform swapping of two numbers with or without third variable.

```
a=int(input("Enter a value of A= "))
b=int(input("Enter a value of B= "))
a=a+b
b=a-b
a=a-b
print("Value of A= ", a, "\nValue of B= ",b)
```

Output:

Enter a value of A= 55

Enter a value of B= 99

Value of A= 99

Value of B= 55

### 6. Write a Python program that read a 3 digit number from user and perform the addition of their digits.

```
a=int(input("Enter a 3 Digit Number = "))
if a>100 and a<999:
x=a//100
y=(a-x*100)//10
z=a-x*100-y*10
print("Sum of Your 3 Digit Number= ", x+y+z)
else:
print("SORRY!!! Please Enter Only 3 Digit Number")
```

Output:

Enter a 3 Digit Number = 578

Sum of Your 3 Digit Number= 20

### 7. Write a python program to find the greatest number among three.

```
a=int(input("Enter a Number = "))
b=int(input("Enter a 2nd Number = "))
c=int(input("Enter a 3rd Number = "))
if a>b and a>c:
print(a," is greatest number")
elif b>a and b>c:
print(b," is greatest number")
else:
print(c, " is greatest number")
```

Output:

Enter a Number = 777

Enter a 2nd Number = 950

Enter a 3rd Number = 586

950 is greatest number

### 8. Write a python program to display a greet message according to the marks obtained by the student.

```
a=int(input("Enter Your Marks in % = "))
if a>=90 and a<=100:
print("Excellent")
elif a>=70 and a<=90:
print("Very Good")
elif a>=60 and a<=70:
print("Good")
elif a>=40 and a<=60:
print("Hard Work Needed")
elif a>=0 and a<=40:
print("Better Luck Next Time")
else:
print("SORRY!!! Please Inter Valid Marks in %")
```

Output:

Enter Your Marks in % = 90

Excellent

### 9. Enter basic salary from the user. Write a program to calculate DA and HRA on the following conditions:-

Salary DA HRA

<=2000 10% 20%

>2000 && <=5000 20% 30%

>5000 && <=10000 30% 40%

>10000 50% 50%

```
a=int(input("Enter Your Salary = "))
if a<=2000:
da=a*10/100
HRA=a*20/100
print("Your DA= ", da)
print("Your HRA= ", HRA)
elif a>2000 and a<=5000:
da = a*20/100
HRA = a * 30 / 100
print("Your DA= ", da)
print("Your HRA= ", HRA)
elif a>5000 and a<=10000:
da = a * 30 / 100
HRA = a * 40 / 100
print("Your DA= ", da)
print("Your HRA= ", HRA)
elif a>10000:
da = a * 50 / 100
HRA = a * 50 / 100
print("Your DA= ", da)
print("Your HRA= ", HRA)
```

Output:

Enter Your Salary = 100000

Your DA= 50000.0

Your HRA= 50000.0

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