initial commit

Author: Rohit-2301

conditionalstatements.py

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+import qrcode
+num = int(input("enter num"))
+print(f"you entered {num}")
+if (num > 0):
+    {
+        print("num is positive")
+    }
+elif (num < 0):
+    {
+        print("num is negative")
+    }
+else:
+    {
+
+        print("num is zero")
+
+    }

datastructures/lists.py

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+# A list is an ordered, mutable(changeable) collection of elements in Python. Lists can store any type of data(numbers, strings, other lists, etc.).
+
+# list is a datatype which contains heterogenous data
+numbers = [1, 2, 3, 4, 5]
+for i in numbers:
+    print(i, end=" ")
+print()
+
+info = ['rohit', 21, '22BCS13677']
+for i in info:
+    print(i, end=" ")
+print()
+
+empty_list = []
+
+# accessing list
+fruits = ["apple", "mango", 'banana', "guava", "cherry"]
+print(fruits[0])
+print(fruits[0:2])  # slice
+print(fruits[-1])  # last element
+
+# replacing
+fruits[1] = "watermelon"
+print(fruits[1])
+
+# adding
+fruits.append("melon")  # adds in end
+print(fruits)
+fruits.insert(2, "tomato")
+print(fruits)
+
+# removing
+fruits.remove("tomato")  # remove specific element
+print(fruits)
+fruits.pop()  # remove last element
+print(fruits)
+
+# Create a list of 5 numbers and print their total_sum.
+num = [1, 2, 3, 4, 5]
+total_sum = 0
+for i in num:
+    total_sum = total_sum+i
+print(total_sum)
+# Reverse a list without using[::-1].
+
+while fruits:
+    fruit = fruits.pop()
+    empty_list.append(fruit)
+print(empty_list)

functions.py

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+def greet():
+    print("hello")
+
+
+greet()
+
+# with argument
+
+
+def Name(name):
+    print(f"{name}")
+
+
+Name("rohit")
+
+# with return
+
+
+def add(a, b):
+    return a+b
+
+
+print(add(10, 20))
+
+# default parameter
+
+
+def greet(name="Guest"):
+    print(f"Hello, {name}!")
+
+
+greet()        # Uses default: "Guest"
+greet("Rohit")  # Uses "Rohit"
+
+
+# lambda function
+def square(x): return x*x
+
+
+print(square(4))
+# cube = lambda y: y*y*y
+# print(cube(4))
+
+# Write a function multiply(a, b) that returns the product of two numbers.
+
+
+def multiply(a, b): return a*b
+
+
+print(multiply(5, 6))
+
+# Write a function is_even(n) that returns True if a number is even, otherwise False.
+
+
+def is_even(num):
+    return num % 2 == 0
+
+
+print(is_even(5))
+print(is_even(4))

generate_qrcode.py

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+import qrcode
+qr = qrcode.make("https://www.youtube.com")
+qr.show()

hello.py

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+# initialising variable
+# case sensitive language
+x = 12
+y = 30
+print(12+30)
+# using variables in expressions
+a = 5
+b = 7
+c = 10
+print(a*b*c)
+# taking input from user
+name = input("Enter your name: ")  # default input type is string
+age = int(input("Enter your age: "))
+weight = float(input("Enter your weight (kg): "))
+height = float(input("Enter your height (m): "))
+# print
+print("\nHello, {}! You are {} years old. If you weigh {} kg and stand {} meters tall.".format(
+    name, age, weight, height))

loops.py

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+languages = ["python", "c++", "java", "html", "js"]
+
+# for loop(definite loop)
+# without range
+for lang in languages:
+    print(lang, end=" ")
+print()
+
+# with range
+for i in range(1, 6):
+    print(i, end=" ")
+print()
+for i in range(5):
+    print(i, end=" ")
+print()
+
+# here 1 is start, 10 is end and 2 is to add to every iterations until <10
+for i in range(1, 10, 2):
+    print(i, end=" ")
+print()
+
+
+# while loop(indefinite loop)
+num = 1
+while num <= 5:
+    print(num, end=" ")
+    num += 1  # increases number to avoid infinite loop
+print()
+
+
+char = 'a'
+while char <= 'd':
+    print(char, end=" ")
+    char = chr(ord(char)+1)
+print()
+# continue and break: continue is used to skip that specific iteration and move to next, break is used to exit from the loop
+for i in range(1, 10):
+    if i == 3:
+        continue
+    print(i, end=" ")
+print()
+for i in range(1, 10):
+    if i == 3:
+        break
+    print(i, end=" ")
+print()
+
+# Write a Python program to print all even numbers from 1 to 20 using a for loop.
+for i in range(1, 10):
+    if i % 2 == 0:
+        print(i, end=" ")
+print()
+# Use a while loop to count down from 10 to 1.
+i = 10
+while i >= 1:
+    print(i, end=" ")
+    i -= 1
+print()
+

print.py

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+name = "rohit"
+age = 20
+print(f"my name is {name}, and my age is {age}")
+
+height = "5'8"
+weight = 67.2
+print(f"my height is {height}, and my weight is {weight}")
+
+programming_languages = ["cpp", "java", "JS", "python", "c#"]
+print(programming_languages[1])