About 3 significant digit?

How do i present the output in 3 significant digit?

[Stephen23]

https://www.mathworks.com/help/matlab/ref/fprintf.html

[Walter Roberson]

See also compose()

Answer 1

[Jan]

fprintf('%.3g\n', pi)

3.14

fprintf('%.3g\n', pi * 1e6)

3.14e+06

fprintf('%.3g\n', pi * 1e-6)

3.14e-06