cpp / beginner
Snippet
Switch Statements for Multiple Choices
A switch statement provides an efficient way to execute different code based on a variable's value. It compares a variable against multiple constant values (cases). The break keyword prevents fall-through to subsequent cases. The default case handles any value not matching the listed cases. Switch is often clearer than multiple if-else chains for comparing one value against many options.
snippet.cpp
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#include <iostream>int main() {int grade = 3;switch (grade) {case 1:std::cout << "Excellent!" << std::endl;break;case 2:std::cout << "Good job!" << std::endl;break;case 3:std::cout << "Satisfactory." << std::endl;break;case 4:std::cout << "Needs improvement." << std::endl;break;case 5:std::cout << "Not passed." << std::endl;break;default:std::cout << "Invalid grade." << std::endl;break;}return 0;}
Breakdown
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int grade = 3;
Declares integer variable storing a grade value
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switch (grade) {
Begins switch statement evaluating the grade variable
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case 1:
Label matching grade value 1
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std::cout << "Excellent!" << std::endl;
Output for excellent grade
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break;
Exits switch statement, prevents fall-through
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case 2:
Label matching grade value 2
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std::cout << "Good job!" << std::endl;
Output for good grade
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break;
Exits switch statement
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case 3:
Label matching grade value 3
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std::cout << "Satisfactory." << std::endl;
Output for satisfactory grade
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break;
Exits switch statement
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default:
Catches any grade value not explicitly listed
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std::cout << "Invalid grade." << std::endl;
Output for invalid grade values