The difference between ++i and i++ in c++

In C, the difference between the increment operators i and i is the order of execution: i is incremented first and then the expression is evaluated, while i is first evaluated and then incremented. Therefore, use i when you need to use the incremented value immediately, and use i when you need to use the original value first and then increment it.

The difference between i and i in C

In C, i and i are both increment operators, but they differ in the order of execution.

i: Prefix increment

• The value of i will be incremented before calculating the expression .
• Syntax: i
• The following example increases the value of i by 1 and then prints the result:

<code class="cpp">int i = 10;
cout << ++i << endl; // 输出：11</code>

i : post-increment

• Evaluates the expression first, and then increments the value of i.
• Syntax: i
• The following example prints the value of i and then increments it by 1:

<code class="cpp">int i = 10;
cout << i++ << endl; // 输出：10</code>

Summary

• i Increments i before evaluating the expression.
• i Increments i after evaluating the expression.
• Use i when you need to increment i and use its new value immediately. Use i when you need to use the original value of i before incrementing it.

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