command line if else

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 .

In fact, the meaning of "if else" is the same as the literal meaning, that is, "if" or "otherwise". Let's take a look at an example that uses if. If you're writing a program for a robot, the robot's function is to evaluate the user's hobby. Robot:

  The pre-processing process scans the source code and performs initial conversion to generate new source code for the compiler. It can be seen that the preprocessing process processes the source code prior to the compiler. In C language, there is

My answer is, more than two else if, or switch for more than two case. But is it normal to use a lot of if else and switch case in your code? Wrong! Most of the more than two of the if else and switch case should not appear as hard coded (hard-coded)

The IF statement determines which branch to execute by using relational operators to determine whether an expression is true or false. The Shell has three kinds of if ... else statements: If ... fi statement; If ... else ... fi

The IF statement determines which branch to execute by using relational operators to determine whether an expression is true or false. The Shell has three kinds of if ... else statements: If ... fi statement; If ... else ... fi

The IF statement determines which branch to execute by using relational operators to determine whether an expression is true or false. The Shell has three kinds of if ... else statements: If ... fi statement; If ... else ... fi

The IF statement determines which branch to execute by using relational operators to determine whether an expression is true or false. The Shell has three kinds of if ... else statements: If ... fi statement; If ... else ... fi

Time: 2014.07.01 Location: Base ---------------------------------------------------------------------------- I. Pre-processing details before compiling conditions, first understand the pre-processing process. The pre-processing process reads the

The preprocessing process scans the source code, makes a preliminary conversion, and generates a new source for the compiler. The preprocessing process can be seen before the source code is processed by the compiler.In the C language, there is no