linux if then else syntax

In the shell of Linux The IF statement determines which branch to execute through the relational operator to determine the true or false of an expression. The Shell has three kinds of if ... else statements: If ... fi statement; if ... else .

#if Else statement, divided into three kinds: if...fi; If ... else ... fi; If ... elif...else...fi#if Else FI statement syntax#if [Expression]#then# Statement to being executed if expression is true#else# Statement to being executed if expression is

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Compiler Development Series -- Ocelot language 1. Abstract syntax tree, -- ocelot syntax Starting from today, I began to study and develop my own programming language Ocelot. Starting from the "self-made compiler", I continued to improve and

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Quick query of Linux Shell syntax compiled by myself (comparison using C language syntax) Although I have learned Linux Shell programming, there are only a few chance to write shell scripts (usually I write more when setting up a development

Practice LNMP full-process Shell programming: if syntax exercises, lnmpshell #! /Bin/bash # DATE: wed Jan 17 1 # ywyankerp@163.com # this is a yankerp # The Nginx service is being installedROOT_ID = 0 ML =/usr/local/srcNGINX_ML =/usr/local/src/nginx-

If condition judgment of Linux shell script, linuxshellIF condition judgment1. Basic Syntax:If [command]; thenStatements that meet this conditionFi 2. Extended Syntax: If [command]; then Statements that meet this condition Elif [command];