Python

16)Prime Numbers

no = 1319
div = 2
while div < no: 
    if no % div == 0:   
        print('Prime Number')
        break
    div+=1
else:
    print('Prime Number')

Output:Prime Number

no = 21
div = 2
while div < no: 
    if no % div == 0:  
        print('Not A Prime Number')
        break
    div+=1
else:
    print('Prime Number')

Output:Not A Prime Number