C language--the difference between x and x--

The difference between C language--x and x--

The difference between "--x" and "x--" in C language : The former is called a prefix operation, while the latter is a postfix operation. The prefix operation is to perform the operation first, and then add 1 to the variable x. The postfix operation is to first add 1 to the variable x, and then perform the operation. The result is the same.

Example:

int x=10;
System.out.println(x++);  
System.out.println(x);

The first output is 10, x first uses the value of x in the current expression, and then increments the value of x 1, the second output is 11, because x has increased by 1 after the previous instruction.

int x=10;
System.out.println(++x);
System.out.println(x);

The first one outputs 11, x first increments the value of x by 1, and then uses the value of x in the current expression. The second one also outputs 11, and x increases after the previous instruction. 1.

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