Program to Check Prime Number in Python

                                         Prime Number

Source Code:


while(True):
    flag = 0
    num = int(input(" Enter The Number To Be Checked For :"))
    if(num==1):
        print("",num,"Is Neither Prime Nor Composite.")
    else:
        for i in range(2,num//2+1):
            if(num % i)==0:
                flag = 1
                break
        if(flag==1):
            print("",num,"Is Not A Prime Number.")
        else:
            print("",num,"Is A Prime Number.")



Output: 
 Enter The Number To Be Checked For : 1
 1 Is Neither Prime Nor Composite.
 Enter The Number To Be Checked For : 5
 5 Is A Prime Number.
 Enter The Number To Be Checked For : 9
 9 Is Not A Prime Number.
 Enter The Number To Be Checked For : 89
 89 Is A Prime Number.
 Enter The Number To Be Checked For : 999
 999 Is Not A Prime Number.
 Enter The Number To Be Checked For : 121
 121 Is Not A Prime Number.