if [ int1 -eq int2 ] 如果int1等于int2 if [ int1 -ne int2 ] 如果不等于 if [ int1 -ge int2 ] 如果>= if [ int1 -gt int2 ] 如果> if [ int1 -le int2 ] 如果<= if [ int1 -lt int2 ] 如果< 字符串变量表达式 If [ $a = $b ] 如果string1等于string2 字符串允许使用...
elif [[ $1 = 'redis' ]] || [[ $1 = 'zookeeper' ]]; then echo "Input is $1"else echo "Input Is Error."fi 然而，初次尝试时，我们可能会误用为'else if'，导致脚本执行出错。如在测试脚本中：bash [oracle@standby ~]$ ./ts01.sh zookeeper ./ts01.sh: line 12: syntax ...
test.sh: line 14: syntax error: unexpected end of fi if 的三种条件表达式 if command then if 函数 then 命令执行成功,等于返回0 (比如grep ,找到匹配) 执行失败,返回非0 (grep,没找到匹配) if [ expression_r_r_r ] then 表达式结果为真,则返回0,if把0值引向then if test expression_r_r_r th...
Naturally, this is not optimal. On top of this, involving more advanced shell features such as loops and conditions, we might end up with some complex syntax. 3. Conditional Statements As we’ve already seen, basicif–elsestatements conform to thePOSIXstandard: ...
每个if语句都要用fi结束，而且是每一个if都要对应一个fi。整个if语句用fi闭合起来才算完整，书写时if和fi要垂直对齐以方便查看。格式举例：if condition then command1 command2 fi condition是判断条件，如果 condition 成立（返回“真”），那么 then 后边的语句将会被执行；如果 condition 不成立（...
sh #!/bin/bash fail=0 while ((1==1)) do read -p "please enter you username: " user read -p "please enter you password: " password if [[ $user = 'guoke' && $password = 'guoke123' ]];then echo "login success" exit 1 else if [ $? -ne 0 ];then let fail=fail+1 #...
if (compound_head(page)) // do A; else // do B; folio 并不完美,或许因为大家期望太高,导致少数人对 folio 的最终实现表示失望。但多数人认为 folio 是在正确方向上的重要一步。毕竟后续还有更多工作要实现。 三、folio 后续工作及其他 3.1 folio 开发计划 For 5.17, we intend to convert various fil...
} if (c < ' ') break; /* 注释掉下面这个两行代码 */ /* if (c >= 0x7f) break; */ s++; } #if ENABLE_UNICODE_SUPPORT dst = unicode_conv_to_printable(stats, str); #else { char *d = dst = xstrdup(str); while (1) { unsigned char c = *d; if (c == '\0') break...
SyntaxError :invalid syntax 2019-09-28 16:27 −1)忘记在 if , elif , else , for , while , class ,def 声明末尾添加 :(导致 “SyntaxError :invalid syntax”)该错误将发生在类似如下代码中:12if spam== 42 print('Hello!')2... 澜七玖 ...
Syntax generic-selection:_Generic(assignment-expression,generic-assoc-list)generic-assoc-list:generic-association generic-assoc-list,generic-association generic-association:type-name:assignment-expressiondefault:assignment-expression page 和 folio 的相互转换也很直接。不管 head,tail page,转化为 folio 时,意义等...