Please share the level number and lesson number so that I can help.

Try this:
***
var bestApp = 'studytonight';
let _code = 'I love coding';
let num = 007;
let $123 = 100;
console.log(bestApp);
console.log(_code);
console.log(num);
console.log($123);
***

The content is available in Hindi, but we do not have videos.

Try this:
***
function teaBreak(){
console.log("Start making tea");
console.log("Tea ready");
console.log("Enjoy the tea");
}

let teaHour;

for(teaHour=1; teaHour<=12; teaHour++)
{
if(teaHour%4 == 0)
{
teaBreak();
}
}
***

Slight mismatch.
Try to print "Hello Go" in the second print statement.

Here, this is the correct code:
***
#include

int main() {

long double ldbl = 147.470000L;

unsigned int uint = 20000U;

printf("Value of ldbl is: %Lf\n", ldbl);
printf("Value of uint is: %d", uint);

return 0;

}
***

Which lesson are you talking about. Can you please specify the lesson number so that we can share the correct code.

This is the correct code:
***






http://www.studytonight.com/css/resource/flat-ui-icon/startup-icon.png">


***

Because there is no lesson 8 in level 3. Can you please try to refresh, this should not happen.

Don't use the screen keyword.
Try this code:
***
@media (min-width: 550px) {
body {
font-size:25px;
}
}
***

If you are doing the course, please share the level and lesson number so that I can help you.

You can use === also for matching values, but for this exercise please use ==.
Here is the correct code:
***
let signal = "yellow";
// write logic here
if(signal == 'green'){
console.log('Go');
} else if(signal == 'yellow'){
console.log('Wait');
} else if(signal == 'red'){
console.log('Stop');
} else{
console.log('Error');
}
***