I need One-liners here !

Question

Hi everyone,

Someone can tell me how can we reduce the number of decimals of a float value ?

Example:

For an angle (45):
cos (45) = 0.70710678118

Desired output:
cos (45) = 0.707 (3 decimals)

Thank you.

Answer 1

Thanks to you !

Answer 2

You can also work with the round() function. Example:

print(round(0.1234567, 3))
# prints 0.123

Answer 3

cout << setprecision(3) << fixed << showpoint;
cout << cos (45);