Ask Programiz - Human Support for Coding Beginners

Hi M Idrees Gul,

It usually will not cause an error. The " " is just a space, used to make the output readable.

Without it, the text prints back to back:

cout << "Hey." << "Are you enjoying the course?";

Output:
Hey.Are you enjoying the course?

With a space in between:

cout << "Hey." << " " << "Are you enjoying the course?";

Output:
Hey. Are you enjoying the course?

So " " is not required for the program to run, it is just for nicer output.

If you have more questions, I am here to help 😊

Hi Harish Hansda,

No, Java class names cannot contain spaces. A class name must be a single identifier.

If you want multiple words, write them together using CamelCase, like this:

class MyFirstClass {
}

If you have more questions, I am here to help 😊

Hi Yichao,

In Java, length for an array is a field (a value stored in the array), not a method. That is why you write it without parentheses:

int[] nums = {1, 2, 3};
System.out.println(nums.length);  // 3

Parentheses are only used for methods. For example, strings use a method:

String s = "abc";
System.out.println(s.length());  // 3

So the simple rule is: arrays use length, strings use length().

If you have more questions, I am here to help 😊

Hi Rana Adnan,

Yes, the element you want to position absolutely must be inside the parent in the HTML.

But one more important thing: it will be positioned relative to the nearest parent that has a position set like relative, absolute, or fixed. Most of the time we set the parent to position: relative; so the child stays inside that box.

Example:

.parent { position: relative; }
.child  { position: absolute; top: 0; right: 0; }

If no parent has a position set, the absolute element is positioned relative to the page (the viewport/document), which is why it can jump to a weird place.

If you have more questions, I am here to help 😊

Hi s j,

In C, a string needs one extra character at the end called the null terminator '\0' to mark where the text ends.

So char name[20] has 20 slots total:

• up to 19 slots for the characters you type

• 1 slot for '\0'

That is why you can only store 19 normal characters, even though the array size is 20.

If you have more questions, I am here to help 😊

Hi Revathi Kasireddy,

print is not a variable. It is a built-in function that shows output on the screen.

A variable is something like greeting that stores a value:

greeting = "Merry Christmas"
print(greeting)   # prints the value inside greeting

So print() displays a value, and the variable is what holds the value.

If you have more questions, I am here to help 😊

Hi Tanvi,

We use #include because it gives your program access to standard input and output functions like printf() and scanf().

Example:

#include 

int main() {
    printf("Hello");
    return 0;
}

Without stdio.h, the compiler may not recognize printf() properly.

If you have more questions, I am here to help 😊

Hi 王宇杰,

In Python, the / operator always returns a float, so 25 / 5 becomes 5.0 even though it is a whole number.

If you want an integer result, use //:

print(25 // 5)  # 5

If you have more questions, I am here to help 😊

Hi there! That's a great and very common question when starting to learn about variables in C programming.

To answer your question: You do not need to use int again to change the age variable and print it.

The int keyword is only used when you first declare a variable to specify that the variable is of type integer. Once you've declared the variable, you can change its value without redeclaring its type.

In your example:

#include 

int main() {

    // Create an int variable and print it 
    int age = 25; // Declare and initialize the variable
    printf("%d ", age);

    // Assign a new value and print it
    age = 31; // Change the value of the already declared variable
    printf("%d", age);

    return 0;
}

Initially, you declare int age = 25; to create an integer variable age and set its value to 25. After that, you can simply change the value using age = 31; without using int again. The printf function can then print the updated value without any further declarations.

Hope this helps! Feel free to ask if you have any more questions. 😊

Hi Istvan,

#include adds the iostream library so your C++ program can do input and output, like printing to the screen and reading from the keyboard.

It lets you use things like cout and cin, for example:

#include 
using namespace std;

int main() {
    cout << "Hello";
    return 0;
}

If you have more questions, I am here to help 😊