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1st Semester
CodeTantra

Unit 2 - Lesson 9

23.1.1. Python Program to print Fibonacci series

n = int(input("n: "))
#write your code here
a = 0
b = 1
while a<=n:
	print(a)
	a,b=b,a+b

23.1.2. Write a python program to print prime numbers in a range

#write your code here
x = int(input("x: "))
y = int(input("y: "))
p = ""
for i in range(x,y):
	if(i > 1):
		for j in range(2,i):
			if (i%j)==0:
				break
		else:
			print(i)

23.1.3. Write a python program to find if a number is armstrong or not

#write your code here
n = input("n: ")
r = len(n)
n = int(n)
s = 0
t = n
while t>0:
	d = t%10
	s += d**r
	t = t//10
print("sum of powers:", s)
if s == n:
	print("armstrong number")
else:
	print("not armstrong number")

23.1.4. Program to find a character is a vowel or consonant

# Type your program here...
ch = input("ch: ")
a= "aeiouAEIOU"
if (ch.isalpha() == True):
	if(ch in a):
		print("vowel")
	else:
		print("consonant")
else:
	print("not an alphabet")

23.1.5. Program to find the sum of digits of a number

num = input("num: ")
s = 0
for i in num:
	i = int(i)
	s += i
print("sum:", s)

23.1.6. Program to determine if a number is strong

n= int(input("num: "))
s=0
t=n
while(n):
	i=1
	f=1
	d=n%10
	while (i<=d):
		f *= i
		i += 1
	s += f
	n //= 10
if (s == t):
	print("strong number")
else:
	print("not a strong number")

23.1.7. Write a Python program to find the Biggest of Three numbers using nested if-else-if

#write your logic here
a,b,c = [int(x) for x in input("a,b,c: ").split(",")]
g=0
for i in a,b,c:
	if g<i:
		g=i
print(g)

23.1.8. Write a Python program to print Floyd's triangle

#write your code here
n=int(input("n: "))
num=1
for i in range(1,n+1):
	for j in range(1, i+1):
		print(num, end=" ")
		num +=1
	print()

23.1.9. Program to determine if a number is perfect number and abundant number and deficient number

num = int(input("num: "))
list1=[]
s = 0
for i in range(1,num):
	if(num%i==0):
		list1.append(i)
print("factors:", list1)
for i in list1:
	s += i
print("sum:", s)
if(s==num):
	print("perfect")
elif(s>num):
	print("abundant")
else:
	print("deficient")

23.1.10. Write a Python program to print pascal's triangle

#write your code here
rows=int(input("rows: "))
for i in range(1,rows+1):
	print(" "*(rows-i),end=" ")
	c=1
	for j in range(1,i+1):
		print(c, sep="", end=" ")
		c=c*(i-j)//j
	print()

23.1.11. Program to determine if a number is prime

num = int(input("num: "))
p=0
for i in range(2,num):
	if(num%i == 0):
		p = "not a prime number"
		break
	else:
		p = "prime number"
print(p)

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