Python

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Python Notes

• To comment a line use #
• Multiline comment use """ comment """
• Assign value in variable variable_name = value
• To display use print() Example
• To scan value from user use input() Example

Condition

• To use if condition use if condition : code else: code Example
• To use else if condition or nested if use if condition: code elif condition: code else: code Example

Loop

• To use for loop use for variable_name in array_name: print(variable_name) Example

String

• Declear String string_name = "string" Example
• Print String print(string_name)Example
• Print targeted letter numbers in string string_name.count('target_letter') Example
• Check length of the string len(string_name)Example
• Print string in customise way string_name[start:end:difference]Example

Questions

• Write a Python program which accepts the radius of a circle from the user and compute the area
• Write a Python program which accepts the user's first and last name and print them in reverse order with a space between them
• Write a Python program to display the first and last colours from the following list: color_list = ["Red","Green","White" ,"Black"]
• Write a Python program that accepts an integer (n) and computes the value of n+nn+nnn.
• Write a Python program to test whether a passed letter is a vowel or not.
• Write a Python program to get the n (non-negative integer) copies of the first 2 characters of a given string. Return the n copies of the whole string if the length is less than 2.
• Write a Python program to find whether a given number (accept from the user) is even or odd, print out an appropriate message to the user.
• Write a Python program to get the difference between a given number and 17, if the number is greater than 17 return double the absolute difference.
• Write a Python program to count the number 4 in a given list
• Write a Python program to get a string which is n (non-negative integer) copies of a given string.
• Write a Python program to calculate the sum of three given numbers, if the values are equal then return three times of their sum.

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