non-integer argument错误是指在使用Shell中的某些命令(如expr)进行整数运算时,传递给这些命令的参数中包含非整数类型的值。Shell中的整数运算要求所有参与运算的参数都必须是整数。如果参数中包含字符串、浮点数或其他非数字字符,就会导致这个错误。 2. 给出导致shell non-integer argument错误的常见
expr: non-integer argument [root@xuexi ~]# if [ $? != 0 ];then echo '$a or $c is non-integer';fi $a or $c is non-integer 1. 2. 3. 4. 5. (7).比较操作符< <= = == != >= >用法示例。其中"<"和">"是正则表达式正的锚定元字符,且"<"会被shell解析为重定向符号,所以需...
方式三:expr [root@m01 ~]# expr 1+21+2[root@m01 ~]# expr 1 + 23[root@m01 ~]# expr 1 / 20[root@m01 ~]# expr 1.1 / 2expr: non-integer argument 需要加空格,也不支持浮点型 方式四:bc Linux下的一个计算器程序,可以处理整数和小数。Shell 本身只支持整数运算,想计算小数就得使用 bc 这...
对于= < > 要在 [[ ]] 或者 (( ))双层里面用,-ne -eq -lt 用在[ ]和()单个里面 且-ne -eq -lt等等只能比较两个整数。 expr也只能计算整数,当expr报错 expr: non-integer argument ,就需要看看他计算的数值是都全部为整数。
expr: non-integer argument [root@xuexi ~]# if [ $? != 0 ];then echo '$a or $c is non-integer';fi $a or $c is non-integer (7).比较操作符< <= = == != >= >用法示例。其中"<"和">"是正则表达式正的锚定元字符,且"<"会被shell解析为重定向符号,所以需要转义或用引号包围。
path). PYTHONUNBUFFERED If this is set to a non-empty string it is equivalent to specifying the -u option. PYTHONVERBOSE If this is set to a non-empty string it is equivalent to specifying the -v option. If set to an integer, it is equivalent to specifying -v multiple times. PYTHON...
echo将argument送到标准输出(stdout),通常显示在屏幕 stdin 标准输入 stdout 标准输出 stderr 标准错误输出 echo -n # 取消换行符 echo -e # 启用反斜杠转译 4. ""(双引号)与(单引号)有什么区别? hard quote:''(单引号),关闭所有引用 soft quote:""(双引号),保留$引用 ...
string pad no longer allows non-printable characters as padding (#9854). string repeat now allows omission of -n when the first argument is an integer (#10282). string match and replace have a new --max-matches option to return as soon as the specified number of matches have been identif...
If the first argument (argument 0) to the tcsh shell is - (hyphen), then it is a login shell. You can also specify the login shell by invoking the tcsh shell with the–las the only argument. Thez/OS UNIX System Servicestcsh shell accepts the following options on the command line: ...
Use non-negative integer `i` to capture column value into user variable @i. With user variables, the decodeColumns option enables you to perform preprocessing transformations on their values before assigning the result to columns. fieldsTerminatedBy: string (default: "\t") - This option has ...