how does one indent in this program. after a colon isn't working.

Answer 1

Show your code.

Answer 2

This is from the interpreter so ignore the >>>.
There are 4 spaces before the print, none before the other lines.

>>> marks =90
>>> if marks >80 and marks <= 100:
... print ('A')
...
A

Answer 3

marks =90
if marks >80 and marks <= 100:
print ('A')

Answer 4

int marks = 90;
if (marks > 80 && marks <= 100) {
print('A')
}