Py: 5. Python Strings

Python string is the collection of the characters surrounded by single quotes, double quotes. Python treated single quotes the same as double quotes. The sequence of characters may include a letter, a number, special character or a backslash.

Syntax:

str = "Hello World!"

Indexing

The indexing of the Python strings starts from 0 similar like list.

Example:-

str = "PYTHON"

print(str[0])

print(str[1])

print(str[2])

print(str[3])

print(str[4])

print(str[5])

print(str[6])

# Returns the IndexError because 7th index doesn't exist

print(str[7])

Output:-

IndexError: string index out of range

Exercise:-

Comments

C: 10. Array

An array is defined as the collection of similar type of data items stored at contiguous memory locations. For example, if we want to store the marks of a student in 6 subjects, then we don't need to define different variables for the marks in the different subject. Instead of that, we can define an array which can store the marks in each subject at the contiguous memory locations. An array index starts with 0. Syntax:- data_type array_name[array_size]; int marks[5]; Example:- #include<stdio.h> int main(){ int i=0; int marks[5];//declaration of array marks[0]=80;//initialization of array marks[1]=60; marks[2]=70; marks[3]=85; marks[4]=75; //traversal of array for(i=0;i<5;i++){ printf("%d \n",marks[i]); ...

JS: Cheatsheet

Datatypes Difference Between Var, Let and Const Functions and its types Asynchronous operations in JS

C++: 7. Inheritance

In C++, inheritance is a process in which one object acquires all the properties and behaviors of its parent object automatically. In such way, you can reuse, extend or modify the attributes and behaviors which are defined in other class. In C++, the class which inherits the members of another class is called derived class and the class whose members are inherited is called base class. The derived class is the specialized class for the base class. Single Level Inheritance When one class inherits another class, it is known as single level inheritance. Example:- #include <iostream> using namespace std; class Account { public: float salary = 60000; }; class Programmer: public Account { public: float bonus = 5000; }; int main(void) { ...

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