adds day 1 codes

Author: anishLearnsToCode

day-1/arithmetic-operations.py

@@ -0,0 +1,18 @@
+# Arithmetic operations
+a = float(input())
+b = float(input())
+
+print(a + b)
+print(a - b)
+print(a * b)
+print(a / b)
+
+# Integer division a / b --> int(a / b)
+print(a // b)
+# print(int(-10.9))
+
+# Mod operator --> a - (a // b) * b
+print(a % b)
+
+# power function (a^b)
+print(a ** b)

day-1/comments.py

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+# Comments
+# Single Line Comment
+# single line comment
+
+"""
+Multiple Line Comments
+This is
+a
+big paragraph
+explaining the code
+"""
+
+# Camel case (completely used in java/c++/C#/C and python)
+firstSecondThirdFourth = 10
+firstName = 'john'
+lastName = 'doe'
+randomWordGenerator = 10
+
+# Snake case (heavily used in python)
+first_second_third_fourth = 100
+first_name = 'john'
+last_name = 'doe'
+
+# Pascal Case (classes in java and C++ --> not used in python)
+FirstName = 'anish'
+LastName = 'sachdeva'
+
+# Allowed Variables
+# asdasdsadas
+# i, j, k, l, m, m
+anish = 10
+# 23hy # not allowed
+_dfds = 90
+number3432423 = 100

day-1/even-odd.py

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+number = int(input())
+
+if number % 2 == 0:
+    print('number is even')
+else:
+    print('number is odd')

day-1/factorial.py

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+"""
+Factorial
+N! = 1 * 2 * 3 * ... * N
+N! = N * (N-1)!
+0! = 1
+"""
+
+n = int(input())
+
+acc = 1
+i = 1
+while i <= n:
+    acc *= i        # acc = acc * i
+    i += 1          # i = i + 1
+
+print(acc)
+
+n = int(input())
+acc = 1
+for number in range(1, n + 1):
+    acc *= number
+print(acc)

day-1/for-loops.py

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+"""
+For Loops
+for var in iterable_object:
+    code
+    code
+"""
+
+for number in range(10, -1, -2):
+    print(number)
+
+n = int(input())
+acc = 1
+for number in range(1, n + 1):
+    acc *= number
+print(acc)
+
+for character in 'banana':
+    print(character)

day-1/hello-world-loop.py

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+n = int(input())
+i = 0
+while i < n:
+    print('hello world')
+    i += 1

day-1/hello-world.py

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+print('hey there', end='####')
+print('hello', end='--')
+print('this')
+print('i am in next line', end='')

day-1/if-else-conditions.py

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+"""
+If else statements
+
+if condition:
+    code
+    code
+    code
+else: (not necessary)
+    code
+    code
+    code
+
+If condition: (compulsory)
+    code
+    code
+    code
+elif condition2: (not compulsory)
+    code
+    code
+elif condition3:
+    code
+    code
+elif condition4:
+    code
+    code
+    .
+    .
+    .
+
+else: (not compulsory)
+    code
+    code
+"""
+
+# if (condition)  { sdfdsfsdf }
+
+if False:
+    print('i am in if block')
+    print('yeah!!!!!!!!!!!!!')
+else:
+    print('i am in else block')
+    print(':(')
+
+print('i am outside if else')

day-1/infinite-loop.py

@@ -0,0 +1,24 @@
+# i = 1
+# while True:
+#     print('hello world : ' + str(i))
+#     i += 1
+
+hello = 'hello'
+iterable = hello.__iter__()
+print(type(iterable))
+
+# print(iterable.__next__())
+# print(iterable.__next__())
+# print(iterable.__next__())
+# print(iterable.__next__())
+# print(iterable.__next__())
+# print(iterable.__next__())
+
+iterable = hello.__iter__()
+while True:
+    try:
+        var = iterable.__next__()
+        print(var)
+    except:
+        # print("An exception occurred")
+        break

day-1/input.py

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+firstName = input()
+lastName = input()  # leftName <-- input()
+
+# print(firstName)
+# print(lastName)
+print(type(firstName))
+# string concatenation
+print(firstName + ' ' + lastName)

day-1/int-input.py

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+number = int(input())
+print(type(number))
+print(number)
+
+
+# taking float value
+# number = float(input())

day-1/largest-3-numbers.py

@@ -0,0 +1,10 @@
+a = int(input())
+b = int(input())
+c = int(input())
+
+if a >= b and a >= c:
+    print(a)
+elif b >= a and b >= c:
+    print(b)
+else:
+    print(c)

day-1/lists.py

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+"""
+List / Array
+Iterable
+"""
+
+numbers = []
+print(type(numbers))
+
+# adding elements
+# append adds at the last index (value)
+numbers.append(10)
+numbers.append(45)
+print(numbers)
+
+# insert (index, value)
+numbers.insert(0, 45)
+print(numbers)
+
+# remoing an element
+# pop (no arg) --> removes from last index
+# remove(value)
+# del keyword removes variable
+
+# Sorting a list
+# list_name.sort()
+
+# splicing
+# list[start : stop : step]
+# by default start = 0, stop = len(list), step = 1
+
+# reversing a list
+# list[::-1]

day-1/logical-operators.py

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+# Boolean type
+var = False
+# print(type(var))
+
+# print(True)
+# print(False)
+
+# Or operator
+# print(False or False) # --> false
+# print(True or False)    # true
+# print(False or True)    # true
+# print(True or True)     # true
+
+# And operator
+# print(False and False)  # false
+# print(True and False)   # false
+# print(False and True)   # false
+# print(True and True)    # true
+
+# equality operator
+print(2 == 2)
+
+# comparison operator
+print(1 < 10)
+print(1 > 10)
+print(1 <= 5)   # --> a < b or a == b
+print(-3 >= -5)
+
+# is operator (==)
+print(7 is 7)
+
+# not operator
+print(not True)     # false
+print(not False)    # true

day-1/loop-control-statements.py

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+# Break statement
+# for number in range(1, 10):
+#     if number == 7:
+#         break
+#     print(number)
+
+
+# Continue Statement
+for number in range(1, 10):
+    if number % 2 == 0:
+        continue
+    print(number)

day-1/nested-loop.py

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+for i in range(1, 5):
+    for j in range(2, 6):
+        print(str(i) + ' x ' + str(j) + ' = ' + str(i * j))

day-1/python-if-else.py

@@ -0,0 +1,10 @@
+number = int(input())
+
+if number % 2 == 1:
+    print('Weird')
+elif 2 <= number <= 5: # --> number >= 2 and number <= 5 --> number == 2 or number == 4
+    print('Not Weird')
+elif 6 <= number <= 20:# --> number >= 6 and number <= 20
+    print('Weird')
+elif number > 20:
+    print('Not Weird')

day-1/range-type.py

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+"""
+Range
+range(stop)
+range(start, stop)
+range(start, stop, step)
+
+default start = 0
+default step = 1
+"""
+
+r = range(5, 10, 2)
+print(r.start)
+print(r.stop)
+print(r.step)
+print(type(r))

day-1/sum-of-n-numbers.py

@@ -0,0 +1,20 @@
+"""
+N
+1 + 2 + 3 + 4 + ... + N
+N (N + 1) / 2
+"""
+
+n = int(input())
+acc = 0
+i = 1
+while i <= n:
+    acc += i
+    i += 1
+
+print(acc)
+
+n = int(input())
+acc = 1
+for number in range(1, n + 1):
+    acc += number
+print(acc)

day-1/sum-of-squares.py

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+n = int(input())
+
+i = 1
+acc = 0
+while i <= n:
+    acc += i ** 2
+    i += 1
+print(acc)

day-1/variables.py

@@ -0,0 +1,23 @@
+# string variables
+# string literal ('') ("")
+firstName = 'anish'
+lastName = "sachdeva"
+# print(type(firstName))
+# print(type(lastName))
+# var = input()
+# print(type(var))
+
+# Integer
+# number = -45
+# print(type(number))
+# num2 = 1000
+# num3 = 765
+# print(type(num2))
+
+# Floating Numbers
+# pi = 3.14
+# e = 2.71828
+# number = 10.0
+# print(type(pi))
+# print(type(e))
+# print(type(number))