Answer:
39 + 3
42
393
Explanation:
In this line System.out.println("39 + 3"), the quotation marks are used to delimit a string, then when printed in the console the string is printed as-is.
In the next line: System.out.println(39 + 3), without the quotation marks, the 39+3 is treated as a normal addition and prints the result of the operation.
In the last line printed with the code System.out.println("39" + 3,; the symbol + is used to concatenate the string 39 with the number 3, since the string has no spaces they are printed together.
Answer:
import os
def create_python_script(filename):
comments = "# new python script file"
with open(filename,"w+") as file:
file.write(comments)
filesize = os.path.getsize(filename)
print(f"The size of the file is: {filesize}")
create_python_script("program.py")
Explanation:
The os module is a built-in python file that is used to interact with the operating system terminal. The with keyword is used to create and open a file with write privileges with no need to close the file.
The path.getsize() method is used to get the size of the newly created file which is printed in the console.
Answer:
To do this you'll need to use malloc to assign memory to the pointers used. You'll also need to use free to unassign that memory at the end of the program using the free. Both of these are in stdlib.h.
#include <stdlib.h>
#include <stdio.h>
#define SIZE_X 3
#define SIZE_Y 4
int main(void){
int **matrix, i, j;
// allocate the memory
matrix = (int**)malloc(SIZE_X * sizeof(int*));
for(i = 0; i < SIZE_X; i++){
matrix[i] = (int *)malloc(SIZE_Y * sizeof(int));
}
// assign the values
for(i = 0; i < SIZE_X; i++){
for(j = 0; j < SIZE_Y; j++){
matrix[i][j] = SIZE_Y * i + j + 1;
}
}
// print it out
for(i = 0; i < SIZE_X; i++){
for(j = 0; j < SIZE_X; j++){
printf("%d, %d: %d\n", i, j, matrix[i][j]);
}
}
// free the memory
for(i = 0; i < SIZE_X; i++){
free(matrix[i]);
}
free(matrix);
return 0;
}
Answer:
The correct answer to the following question will be "Operating system".
Explanation:
- An operating system is a machine software that handles hardware of a computer, computing assets and delivers basic services to software programs.
- It is an intermediary between such users and computer hardware.
- It also helps you to interact with your machine without learning how to use your language of the computer.
Therefore, it will be the right answer.
Variables are used to store information to be referenced and manipulated in a computer program. ... It is helpful to think of variables as containers that hold information. Their sole purpose is to label and store data in memory. This data can then be used throughout your program.
