I am sharing my experience so that this could help others.
I use R program and when I try to install a package it says curl is not available.
ERROR: dependency ‘curl’ is not available for package ‘TTR’
But when you try install it in terminal using
sudo apt install curl
You see an output that it is already installed. So, here is the solution
The solution is to use the following command in terminal
sudo dnf install libcurl-devel
After this if you install a package he package will install without any problem.
The R curl package is available in Fedora also; you can install it with
sudo dnf install 'R(curl)'.
Many other R packages are available and can be installed as
sudo dnf install 'R(packageName)'