c++ while loop decrement
To explain the steps of a while loop in C++ with decrement, here is a breakdown:
Initialization: Start by initializing a variable with an initial value. This variable will be used to control the loop. For example,
int i = 10;
initializes the variablei
with a value of 10.Condition: Next, specify a condition that must be true for the loop to continue executing. This condition is checked before each iteration of the loop. For example,
while (i > 0)
checks if the value ofi
is greater than 0.Loop Body: If the condition is true, the code inside the loop body will be executed. This is the block of code enclosed within curly braces
{}
following thewhile
statement. For example,cout << i << endl;
prints the value ofi
to the console.Decrement: At the end of each iteration, the loop variable is decremented to move closer to the termination condition. In this case,
i--
subtracts 1 from the value ofi
. It could also be written asi = i - 1
ori -= 1
.Termination: If the condition in step 2 is false, the loop terminates, and the program continues with the next line of code after the loop. In this example, when
i
becomes 0, the conditioni > 0
becomes false, and the loop stops executing.
Here's an example that combines all these steps:
#include <iostream>
int main() {
int i = 10;
while (i > 0) {
std::cout << i << std::endl;
i--;
}
return 0;
}
This code will print the numbers from 10 to 1, each on a new line. The loop will terminate when i
becomes 0.