if then examples

The conditional judgment statement in the shell is an upgrade to the previous "conditional test statement in the shell", meaning that the preceding test statement serves the IF~THEN~FI statement for the current judgment statement.We're still rolling

Original source: http://zhuanlan.zhihu.com/wille/19763358Author: Han HaoKnow: HeinrichWeibo: @ Peanut oil workersA story that has nothing to do with timeI would like to dedicate this article to the Dalian Maritime University Wu Nan teacher, Liu

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$out = "" and then $out. = with direct $out = What's the difference there are examples below PHP Code $fp = @fsockopen ($whoisserver, $port, $errno, $errstr, $timeout) or Die ("Socket Error". $errno. " - " . $ERRSTR); Fputs ($FP,

The conditional judgment statement in the shell is an upgrade to the previous "conditional test statement in the shell", meaning that the preceding test statement serves the IF~THEN~FI statement for the current judgment statement. We're still

What is traits? Why do people think of it as an important technology of C ++ generic programming? In short, traits is so important because it allows the system to make decisions based on the Type during compilation,It is like making a decision based

If...then...elsif implementation of multi-branch judgment statementsIts syntax is as follows:If ThenPlsql_sentence_1;Elseif Thenplsql_sentence_2;...ElsePlsql_sentence_n;End If;There is no condition behind the last else, which is more

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Conditional control StatementsIf statementSimple if judgment statement, when the condition after the if is true, execute print (' yes '), otherwise execute the statement inside the Else, print (' No ')if True: print ('yes')else: print ('

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