My question is that i don't Know how to practice topics those we learn .??..is there any way like mathematics we get que easily

Answer 1

You can practice by solving code coach questions here in sololearn. There are questions of varying difficulty there

Answer 2

First try some easy level programs(patterns, number manipulations,...) , then increase level to medium to high..(challenges by community has all level of programs.., check ones.)

Like mathematics..? Yes.. Every problem in maths we solve it on paper, if we do by a language on computers, it is said a program. For every program, it's better to write solve it on paper with required flow of steps to implement it as a program, it is nothing but called as algorithm. It's a best practice to algorithm first to write a complex programs..
Its easyest the task..

These may help you.. Take a look all & coding practice sites.
https://www.sololearn.com/discuss/595802/?ref=app
https://www.sololearn.com/discuss/437973/?ref=app
https://www.sololearn.com/discuss/1566003/?ref=app
https://www.sololearn.com/discuss/919386/?ref=app
https://www.sololearn.com/discuss/1091816/?ref=app
https://www.sololearn.com/discuss/452538/?ref=app
https://www.sololearn.com/discuss/692644/?ref=app
https://www.sololearn.com/discuss/923664/?ref=app