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Chapter 5: Problem 38

Convert the following for loop to a while loop: \\[ \begin{array}{l} \text { for }(\operatorname{int} x=50 ; x>0 ; x--) \\ \\{ \end{array} \\] cout \( < < x< < \) seconds to \(g \circ \cdot \ln "\) \\}

Short Answer

Expert verified
Question: Convert the provided for loop into a while loop. Given for loop: ``` for(int x=50; x>0; x--) { cout << x << " seconds to go..." << endl; } ``` Solution: ``` int x = 50; while (x > 0) { cout << x << " seconds to go..." << endl; x--; } ```

Step by step solution

01

Analyze the given for loop

The given for loop's structure is: \[ \begin{array}{l} \text { for }(\operatorname{int} x=50 ; x>0 ; x--) \\ \\{ \end{array} \\] This loop initializes an 'int' variable named 'x' at a value of 50. The loop continues as long as 'x' is greater than 0, and 'x' is decremented by one in each iteration.
02

Initialize the variables

We will first initialize the variables outside the while loop. We begin with an 'int' variable named 'x', initializing it with the value 50. \[ \begin{array}{l} \operatorname{int} x=50; \end{array} \\]
03

Create the while loop condition

Now, we create the while loop with the same condition as the given for loop. The loop will iterate as long as 'x' is greater than 0. \[ \begin{array}{l} \text { while }(x > 0) \\ \\{ \end{array} \\]
04

Write the loop body

Inside the loop body, we put the same content as in the for loop. We will print the message with the current value of 'x' and then decrement 'x'. This will be similar to the printing and decrementing in the for loop. \[ \begin{array}{l} \text { } cout \ll x \ll \text { " seconds to \(" } g \circ \cdot \ln "\) "; \\ x--; \\} \end{array} \\]
05

Combine the steps

Combine all steps to create the final while loop version of the given for loop: \[ \begin{array}{l} \operatorname{int} x=50; \\ \text { while }(x > 0) \\ \\{ \end{array} \\] \[ \begin{array}{l} \text { } cout \ll x \ll \text { " seconds to \(" } g \circ \cdot \ln "\) "; \\ x--; \\} \end{array} \\]

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Most popular questions from this chapter

When the increment or decrement operator is placed before the operand (or to the operand’s left), the operator is being used in __________ mode.

T \(\mathrm{F}\) Variables may be defined inside the body of a loop.

include using namespace std; int main () \\{ int count \(=1,\) total; while $(\operatorname{count} < =1… # // This program displays the sum of the numbers \(1-100\) # include using namespace std; int main () \\{ int count \(=1,\) total; while \((\operatorname{count} < =100)\) total \(+=\) count cout \( < < \) "The sum of the numbers \(1-100\) is "; cout $ < < \( total \) < < $ endl return 0; \\}

\(\mathrm{T} \mathrm{F}\) In a nested loop, the inner loop goes through all of its iterations for every \(\sin -\) gle iteration of the outer loop.

Write a while loop that lets the user enter a number. The number should be multiplied by \(10,\) and the result stored in the variable product. The loop should iterate as long as product contains a value less than 100 .
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