Manjaro os showing black screen on boot

I am using manjaro linux from last one month but today my os shows black screen on boot and i don’t want to loose my projects.

Hello and welcome,

Maybe this would be helpful;

Also the following guide will include tips on how to format code etc;

Actually I am beginner so if you can help me step by step that would be better for me.

The guide there is step-by-step.

I suggest first trying to get access via TTY

If that works then after logging in a good start would be system info.
We can also conveniently send it to a paste;

inxi -Farz | curl -F 'file=@-' https://0x0.st