digit-separator – Tarik Billa

Are C++14 digit separators allowed in user defined literals?

July 27, 2023 by Tarik

If you look at the grammar, user-defined-integer-literal can be octal-literal ud-suffix, and octal-literal is defined as either 0 or octal-literal ’opt octal-digit. N4140 §2.14.8 user-defined-literal: user-defined-integer-literal […] user-defined-integer-literal: octal-literal ud-suffix […] N4140 §2.14.2 octal-literal: 0 octal-literal ’opt octal-digit So 01’23s is a perfectly valid literal.

Add ‘decimal-mark’ thousands separators to a number

March 19, 2023 by Tarik

If you want to add a thousands separator, you can write: >>> ‘{0:,}’.format(1000000) ‘1,000,000’ But it only works in Python 2.7 and above. See format string syntax. In older versions, you can use locale.format(): >>> import locale >>> locale.setlocale(locale.LC_ALL, ”) ‘en_AU.utf8’ >>> locale.format(‘%d’, 1000000, 1) ‘1,000,000’ the added benefit of using locale.format() is that it … Read more