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Rewrite the following code using a for loop. long prod = 5; 1 = int x = 3; boolean valid = true; while (x <= 22 && valid) { prod = prod * prod; x = x + 5;

Rewrite the following code using a for loop. long prod = 5; 1 = int x = 3; boolean valid = true; while (x <= 22 && valid) { prod = prod * prod; x = x + 5;

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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### Converting a While Loop to a For Loop In this section, we will learn how to rewrite a `while` loop using a `for` loop. Consider the following code snippet: ```java long prod = 5; int x = 3; boolean valid = true; while(x <= 22 && valid) { prod = prod * prod; x = x + 5; } ``` #### Explanation of the Given Code 1. **Initialization:** - A `long` variable `prod` is initialized to `5`. - An `int` variable `x` is initialized to `3`. - A `boolean` variable `valid` is set to `true`. 2. **While Loop Condition:** The loop will continue to execute as long as both conditions are true: - `x` is less than or equal to `22`. - `valid` is `true`. 3. **Loop Body:** - `prod` is multiplied by itself and the result is stored back in `prod`. - `x` is incremented by `5`. #### Conversion to a For Loop To rewrite this `while` loop using a `for` loop, we need to incorporate the initialization, condition, and increment/decrement steps in the syntax of the `for` loop. Here's how you can do this: ```java long prod = 5; boolean valid = true; for(int x = 3; x <= 22 && valid; x += 5) { prod = prod * prod; } ``` - **Initialization:** `int x = 3` is placed in the initialization section of the `for` loop. - **Condition:** `x <= 22 && valid` remains as the condition for the loop. - **Increment:** `x = x + 5` is translated to `x += 5` and placed in the increment section of the `for` loop. - **Loop Body:** The body of the loop remains unchanged. By using a `for` loop, we can write more concise and potentially more readable code.
Transcribed Image Text:### Converting a While Loop to a For Loop In this section, we will learn how to rewrite a `while` loop using a `for` loop. Consider the following code snippet: ```java long prod = 5; int x = 3; boolean valid = true; while(x <= 22 && valid) { prod = prod * prod; x = x + 5; } ``` #### Explanation of the Given Code 1. **Initialization:** - A `long` variable `prod` is initialized to `5`. - An `int` variable `x` is initialized to `3`. - A `boolean` variable `valid` is set to `true`. 2. **While Loop Condition:** The loop will continue to execute as long as both conditions are true: - `x` is less than or equal to `22`. - `valid` is `true`. 3. **Loop Body:** - `prod` is multiplied by itself and the result is stored back in `prod`. - `x` is incremented by `5`. #### Conversion to a For Loop To rewrite this `while` loop using a `for` loop, we need to incorporate the initialization, condition, and increment/decrement steps in the syntax of the `for` loop. Here's how you can do this: ```java long prod = 5; boolean valid = true; for(int x = 3; x <= 22 && valid; x += 5) { prod = prod * prod; } ``` - **Initialization:** `int x = 3` is placed in the initialization section of the `for` loop. - **Condition:** `x <= 22 && valid` remains as the condition for the loop. - **Increment:** `x = x + 5` is translated to `x += 5` and placed in the increment section of the `for` loop. - **Loop Body:** The body of the loop remains unchanged. By using a `for` loop, we can write more concise and potentially more readable code.
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