 In the previous article, we have seen how can write if, if-else, and nested if conditional statements in python. In this article let us use the conditional statements to write some Python programs.

#### Check for Prime Number

The below Python program takes input from the user and checks if the input number is a prime number or not.

```a=int(input("Enter the number"))
if(a%2==0):
print("number is prime")
else:
print("Number is not prime")``` #### Check if a number is a positive number, negative number or zero using nested if statement

Below Python program takes input from the user and checks whether a given number is a positive number, negative number or zero. In this program, we will use the nested if the condition

```a = float(input("Enter the number: "))
if a >= 0:
if a == 0:
print("Number is Zero")
else:
print("Number is Positive number")
else:
print("Number is Negative number")``` #### Check if a number is a positive number, negative number or zero using elif statement

Below Python program takes input from the user and checks whether a given number is a positive number, negative number or zero. In this program, we will use the nested if the condition, like if and elif.

```a = float(input("Enter the number: "))
if a > 0:
print("Number is Positive number")
elif a == 0:
print("Number is Zero")
else:
print("Number is Negative number")``` 