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So I see Solo Learn has SQL but why not PostgreSQL or MySQL or any NoSQL DBs like MongoDB?
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1 ответ
Why can't we assign a variable in python like this it gives an error, example : myvariable = 052
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why didnt it compile with variable a=100 and after it a=50 was written ......and the output was 50 .....
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Why it is said here that when passing an object to function it must be passes by reference ?
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Why are some variables declared outside the class and others in the block of code known as void main()?
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According to you !! Which is the most amazing coding in Sololearn till date ? And why ??? ^~^
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why i am unable to solve first question in html5 please help to get it out from first round
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So head tag is supposed to be for the non-visual stuff right? why does it display text if i write it between the head tags?
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Please why does this code return l instead of F. And I compared that if X is assigned to 5%5 ......isn't this correct to compare
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Why we can create a repertory for localise the coder for having the teachers and elders and big brothers to help us at grow?
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Why does my Sololearn app crashes when ever it is reading time and I click the link on my feed to read
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Ok. In these lessons there is one thing I couldn't understand. What's the point about operator overloaded and why are they useful?
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in the following why the code num=num+1;can't be applied just after while loop in the beginning of curly braces?
#include <iostream>
using namespace std;
int main()
{
int num = 1;
while (num < 6) {
cout << "Number: " << num << endl;
num = num + 1;
}
return 0;
}
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7 ответов
If the css code has transform, or 2d or 3d and other effects , why it is prefered to use jquery???
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2 ответов
I was wondering why there is no C programming language here in solearn while C is one of the most important...
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Why can't i run ES6 on solo learn. Some code works well elsewhere but throws errors on solo learn. Please help
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hi guys can anyone tell me what is the use of namespace with an example and why only namespace std not namespace cout and how I know which type of namespace s are used writing an program?
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3 ответов
Hello. I can upload photos, videos and music in css and html to Windows, but I can't here on Android. Does anyone know why ?! Ca
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1 ответ
Why loading leaderboard takes a long time? I generally use my phone for sololearn. I do not know if that's the case with PC too.
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Why [] symbols are used in parameters of general notation of any thing in JavaScript for eg 'new RegExp(pattern[, flags])'??
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1 ответ
Can any one explain me why i am loosing more xp in chalnges more than 15 xp when i lost and getting less than 10 xp when i won ?
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I am making a game. But I am facing a problem :- Why my code is not showing "GAME OVER !" (At line :‐ 56). PLESE ! HELP 🥺🥺....
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In the last exercise of this section the element requires # before its name. Why is this not mentioned anywhere in CSS lessons?
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why this program show compile error?
#include<iostream>
using namespace std;
class a{
public:
int f(){cout<<3;}
int f(int a){cout<<a;}
};
class b:public a
{
public:
int f(){cout<<5;}
};
int main()
{
b obj;
obj.f(7);
}
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4 ответов
Why this <div> is in same line as <p> tag (i tought that p and div are block lvl elements ) please help me fix my code
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2 ответов
Can someone tell me why it gives *no output" when i insert high values? EDIT : Now it works for some reasson...
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Why it is that while we include header file here we only have to write <iostream> but while coding in computer <iostream.h>
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Why does this not give me this 15 beep 14 13 12 11 10 beep 9 8 7 6 5 beep 4 3 2 1 (imagine each one of them is in ligne)
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2 ответов
why it is not show any output when run this program
#include<iostream>
using namespace std;
int main(){
for(;;){
int i=0;
if(i==1){
cout<<i;
break;
}
++i;
}
1 голос
2 ответовin nested 'if' . why dos 'if' statement is execute the first answer, even there is some right answer in below. why is work in first come first serve, if I wanted to get more answer in an 'if' state ment is it possible in python
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Hey guys how is everybody doing? Why when we want to take array from user we first declare array like int x[2] which means reser
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1 ответ
Why do one have to use variables since you can tell the program to print what you stored in the variable?
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2 ответов
Why is using "using" important? As well how to make a class that can be declared inside of a using statement.
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2 ответов![[No Name] - avatar](https://blob.sololearn.com/avatars/f81aa1e2-7759-4408-acba-e704b46aed71.jpg)
Why does the challenges questions are of to calculate maths , it takes time ..? It should be of logical thinking..!
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I don't understand why is it an syntax error when I type the following else:
can someone explain to me please.
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why does the 'else' statement on this code only work on the 'if' statement before it. I want it to work for all the 'if' statements in the code (that is, if none of the 'if' statements is true, then the else statement should execute). If that is not possible, then how it can be done?
2 голосов
6 ответов
when I wrote
int x;
cin>>x;
if(10<x>15) it is always false
10<x<15 always true
10>x<15 always true
10>x>15 always false
3<x<0 always false
3>x>0 true for x less than 3
can anyone explain why this is happening????
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3 ответов
What is the use of magic method __add__?? In below code why result not returning addition of first and second???
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1 ответ
why in the description of type convertion there is no print command but in the "try it yourself " part?
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