First, Introduction
In shell programming, circular commands are used to control the execution of certain statements under certain conditions, with three commonly used loop statements: for, while, and until. While loops and for loops belong to the
While loop structureWhile condition-determining expressionDoStatement blocks executed when the condition is judged............DoneExample: Using while to output a number 1 to 10 (ascending output)J=1While [$j-le 10]Do#useradd wsyht$j#userdel-R wsyht$
The format of the for loop described earlier is as follows:For VARNAME in List;doStatement...DoneThe For loop in this format is the statement that assigns each value in the list to the variable varname, and then executes in the loop body. When no
4.3.3 for Loop: Within a range ... Each of them ...Since the while statement and Do...while ... Statements have been able to meet the needs of our expression loop phenomenon, why should C + + specifically provide a For statement to express the loop
4.3.3 for Loop: Within a range ... Each of them ...Since the while statement and Do...while ... Statements have been able to meet the needs of our expression loop phenomenon, why should C + + specifically provide a For statement to express the loop
Explanation of Objective-C's run loop, objective-cloop
Objective-C run loop
I don't know if you have ever thought about this problem. An application is put there after it starts to run. If you don't perform any operations on it, the application is
Shell script loop for while until and package management "on"Loop executionTo run a code segment repeatedly multiple timesHow many times to run repeatedly:Number of cycles known beforehandNumber of cycles unknown beforehandThere are entry conditions
Until cycleThe environment used to perform loops when a proposition is falseWhen a proposition is false, it enters the loop; exit the loop when the proposition is trueOr if the condition is not satisfied, enter the cycle of the sceneIn logical
Java cyclic statements-general Linux technology-Linux programming and kernel information. The following is a detailed description. Java loop statements include for, while, and do-while. These statements create what we usually call a loop (loops ).
For more than a year of iOS development, the deep understanding of iOS and objective-c is still limited, and most of it still stays at the API level, which is a pretty sad thing to do. Want to learn a language or need a deep understanding of it, so
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