I don't know why this code is not working ,I have used two different methods ,but one of them givesoutput as0,(numeric triangle)

Question

https://code.sololearn.com/wj7RTz7GOC3H/?ref=app

Answer 1

I'm not sure what you're trying to do, but readline() reads a line from the user, and I'm not sure SoloLearn supports that function. You're also not giving explode a valid delimiter.

You could try to replace $a and $b with hardcoded values. eg.

$a = 10;
$b = 15;

for($i = 0; $i <= $b; $i++){
for($c = $a; $c <= $i; $c++){
echo $c;
}
}

Answer 2

Yaa, but I want to take input from user