18.1.1. Understanding While loop
n = int(input("num: "))
sum = 0
i = 0
while i<n:
i = i + 1
if(i%2==0):
sum = sum + i
print("sum:", sum)
18.1.2. Understand else with while-loop
# Python program to find the sum of integers between 0 and n where n is provided by user
num = int(input("num: "))
#write your logic here
i = 0
s = 0 #sum
if(num>=0):
while( i <=num ):
#write your logic here
s += i
i += 1
else:
#write your logic here
while( i >= num):
s = s+i
i = i - 1
print("sum:", s)
18.1.3. Write a program to find the G.C.D. of two given numbers
x = int(input("x: "))
y = int(input("y: "))
# Write your logic to find out the GCD of x & y
if (x == 0 or y == 0):
print("value must be non zero")
else:
for i in range(1,x+1):
if x%i == 0 and y%i == 0:
gcd = i
print("gcd:", gcd)
18.1.4. Write a program to Calculate Fibonacci numbers less than a given number and calculates the sum of all alternate numbers (even numbered) in the generated list.
# Write your code here
x = int(input("k: "))
list1=[0]
a = 1
b= 0
i = 0
s = 0
sum = 0
while b < x:
s = a+b
a = b
b = s
print(a)
list1.append(a)
while(i<len(list1)):
if (i%2 != 0):
sum += list1[i]
i=i+1
print("sum:",sum)
18.1.5. Write the code.
x = int(input("k: "))
i = 0
while( i<x ):
if i%2 == 0:
print(f"{i} even number")
else:
print(f"{i} odd number")
i += 1
18.1.6. While loop - Practice programs
st2cap = dict()
state = input("state or 'end' to quit: ")
# write condition in while
while( state!="end" ):
# store the input state & capital in a dictionary till the user enters state as end
capital= input("capital: ")
st2cap[state] = capital
state = input("state: ")
print(sorted(st2cap.items()))
