How to use variableas

Question

?

Answer 1

// declaring variables

int x;
int num = 1;
string some_str = "cookies";

// using variables

x = num; // value of x is now 1
cout << x + num; // outputs 2
cout << some_str; // outputs "cookies"

Answer 2

class AddItAll_Using_For_Loop_WhileLoop_And_DoWhile_Loop
{
public static void main(String[] args) {
int sum_of_all=0;
int till=100;
int j=0;
//For Loop
for(j=0;j<=till;j++)
{
sum_of_all+=j;
}
System.out.println("Using For Loop | Sum of all natural numbers till "+till+" is => "+sum_of_all+"\n");

//While Loop

while(j<=till)
{
sum_of_all+=j;
j++;
}
System.out.println("Using While Loop | Sum of all natural numbers till "+till+" is => "+sum_of_all+"\n");

//Do...While

do
{
sum_of_all+=j;
j++;
}while(j<=till);
System.out.println("Using Do...While Loop | Sum of all natural numbers till "+till+" is => "+sum_of_all+"\n");

//with all loops value will be same i did just for explanation of all loops.
}
}

why the value is increased in do while loop when running the code

Answer 3

EVERYTHING THAT IS AFTER //, MEANS INFO... NO COMMANDS

Variables:

I try to tell you that way, so you will know what i mean.

int a; // Variable "a"
int a = 10; // Variable "a" got "10" in itself.

So we can make calculator for example:

int a = 10; // First number is "10"
int b = 5; // Second number is "5"
int sum = a - b; // Summary is "a" - "b" = "10" - "5"

We can make a blank variable and fill it later, example:

int a; // Blank variable (Variable don't have any numbers in it)
cout << "Select one number" << endl; // This command tell our user to type one number

cin >> a; // Number that user typed was stored to variable "a" .

cout << "You typed number << a; // Tell our user that his number is: What he typed.

My first C++ calculator was doing by variables, I get some help from Google , but I don't copied it, I writed it by myself. If you wan't you can get inspired. (If you wanna check it out: https://code.sololearn.com/cyqTln6peslH/# ).

SORRY FOR MY BAD ENGLISH.