declare -i i=1 while [ $i -le 9 ] ;do declare -i j=1 while [ $j -le $i ] ;do echo -en "${i}x${j}=$(($i*$j))\t" let j++ done echo let i++ done 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 4、编写脚本,利用变量RANDOM生成10个随机数字,输出这个10数字,并显示其中...
We use while loops when we don’t know the number of times we want to loop over a code, but we know the condition which determines the execution of the loop body. Whereas for loops are particularly used toiterate over a sequence. When you know the number of times the loop has to be...
您应该反驳说,负while循环会更快!请参阅:JavaScript loop performance - Why is to decrement the iterator toward 0 faster than incrementing. 在while与for中,这两个来源通过在不同浏览器中运行各种循环并以毫秒为单位比较结果,很好地记录了速度现象:https://blogs.oracle.com/greimer/entry/best_way_to_code...
While Loop The second basic type of loop in Java that I will discuss is the "while loop". A while loop is actually just a conditional that repeats itself as long as the condition stays true. It looks a lot like an if statement. Here take a look: A while loop looks just like an i...
While loops are less often used but can be really useful. It’s basically executing its statements while the condition is true. The following example is rolling dice until the max amount of tries is reached. funcrollDice()->Int{return(1...6).randomElement()!}letmaxTries=6vartries=0varsc...
Using Loops in Python. In this tutorial we will learn about how to use loops in python. We will also cover various types of loops, like for loop, while loop etc.
The while loop is one of the first loops that you'll probably encounter when you're starting to learn how to program. It is arguably also one of the most intuitive ones to understand: if you think of the name of this loop, you will quickly understand that the word "while" has got ...
while i < len(browsers): print browsers[i] i = i + 1 Another example of While Loops The script below, first sets the variable counter to 0. For every time the while loop runs, the value of the counter is increased by 2. The loop will run as long as the variable counter is less...
The for loops are especially used when the user knows how many times the statements need to be executed in the code block of the loop. It is similar to the while statement in its function. The statements within the body of the loop are executed as long as the condition is true. Here ...
1. Entry controlled loops In this kind of loop, the condition is checked before executing the loop's body. So, if the condition is never true, it won't execute even once. For example,forandwhileloop. 2. Exit controlled loops In this kind of loop, the condition is checked after the ...