When cygwin executes the shell script, a syntax exception occurs. The most basic if control cannot be parsed.

I learned the shell script today and copied a simple script on the Internet as follows:

#! /Bin/bash
Cygwin = true
# Assign values to variables:
A = "Hello World" # No space exists on both sides of the equal sign
# Print the value of variable:
If $ cygwin; then
Echo "A is:" $
Fi

When cygwin executes the shell script, a syntax exception occurs. The most basic if control cannot be parsed because the script file was created under Windows and needs to be converted to the DOS format, CD to the directory where the script is located, run the command: dos2unix filename, and then run the script. Haha, you can run it. Everything is normal.