[ https://issues.apache.org/jira/browse/SYSTEMML-296?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15279763#comment-15279763 ]
Tatsuya Nishiyama commented on SYSTEMML-296: -------------------------------------------- Hi [~deron], I submitted [PR #151 | https://github.com/apache/incubator-systemml/pull/151]. Please review. > Add elif (else if) to PyDML > --------------------------- > > Key: SYSTEMML-296 > URL: https://issues.apache.org/jira/browse/SYSTEMML-296 > Project: SystemML > Issue Type: Improvement > Components: Parser, PyDML > Reporter: Deron Eriksson > Priority: Minor > > "Else if" (elif) statements are useful since they avoid the need for nested > if/else statements. Currently, DML has "else if" but PyDML does not have an > equivalent "elif". > As an example, here is DML containing "else if" statements: > {code} > x = 6 > if (x == 1) { > print('A') > } else if (x == 2) { > print('B') > } else if (x == 3) { > print('C') > } else if (x == 4) { > print('D') > } else if (x == 5) { > print('E') > } else { > print('F') > } > {code} > Here is the logical equivalent in PyDML using nested "if else" statements: > {code} > x = 6 > if (x == 1): > print('A') > else: > if (x == 2): > print('B') > else: > if (x == 3): > print('C') > else: > if (x == 4): > print('D') > else: > if (x == 5): > print('E') > else: > print('F') > {code} > The nesting becomes especially challenging in a Python-like language as the > number of nested "if else" statements increases due to the use of whitespace > indentations to specify blocks of code. -- This message was sent by Atlassian JIRA (v6.3.4#6332)