Which of the following is a selection structure
if
while
do
for
if
The correct answer is "if." The "if" statement is a selection structure used in many programming languages to execute a block of code only if a certain condition is met.
The selection structure among the options you mentioned is the "if" statement. The "if" statement is used to evaluate a condition and execute a certain block of code if the condition is true.
To understand which of these options is a selection structure, you can look at the syntax and purpose of each one. Let's break down each option:
1. if: The "if" statement is a selection structure that allows you to check a condition and execute a block of code only if that condition is true. It has the basic syntax:
if (condition) {
// code to be executed if the condition is true
}
2. while: The "while" loop is a repetition (or iteration) structure, not a selection structure. It allows you to repeatedly execute a block of code as long as a certain condition remains true. Its syntax is:
while (condition) {
// code to be executed while the condition is true
}
3. do: The "do-while" loop is also a repetition structure like the "while" loop and not a selection structure. It executes a block of code once before checking the condition, and then continues to repeat the block of code as long as the condition remains true. Its syntax is:
do {
// code to be executed
} while (condition);
4. for: The "for" loop is another repetition structure that allows you to execute a block of code repeatedly based on a certain condition. Although it does have conditions within it, the "for" loop is primarily used for iteration and not for selection.
In summary, the "if" statement, among the options you mentioned (if, while, do, for), is the selection structure used to check a condition and execute a specific block of code if the condition is true.