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Day 4: loop structure (while, do... While, ),... While1. Loop Structure (while, do... While,)
1.1. What is a loop structure
In daily life, there will be a lot of things that need to be done repeatedly, such as four seasons of every year, 7 days of
Loops are often used in shell programming, and the commonly used loops are for and while loops. While loops read files by default in rows, and for loops read file-splitting files with spaces, this article combines some examples of current web usage
1.while:Convert for to while,a//for (int i = 1; i B//int i=1;-------in front of the whilewhile (iThe difference between the two is that the for parenthesis contains: initial conditions, cyclic condition, state change, and curly braces.While:
Comparison of foreach and while loops in php. Foreach and while are both loops in php, so what is their difference between foreach and while loops, and that performance will be better, next, I will introduce the differences between foreach and while
4.3 Loop control statementsIn the real world, there is such a phenomenon:As long as the current oil in the tank is less than the tank capacity of 100 liters, the fuel tank has been refueling;has been continuously for the motherland hard work, as
Return is the function that exits the loop body, which is equivalent to ending the method.
The function of break is to end the loop, jump out of the loop body, and execute the subsequent program.
The role of continue is to end the cycle and
4.3 Loop control statementsIn the real world, there is such a phenomenon:As long as the current oil in the tank is less than the tank capacity of 100 liters, the fuel tank has been refueling;has been continuously for the motherland hard work, as
Foreach and while are both loops in php, so what is the difference between foreach and while loops? The performance will be better. Next I will introduce the differences between foreach and while loops and the performance comparison, for more
C # basics: differences between ref and out
The difference between ref and out is that in C #, you can pass parameters either by value or by reference. You can pass a parameter through reference to allow function members to change the parameter
If, while usage differences in different languagesIf, while, and other branch loop structures inherit the external scope, that is, the external variables are visible inside the branch loop structure.However, the C language does not support the
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