C++ Nested if-else Statement Last Updated : 13 Feb, 2025 Comments Improve Suggest changes Like Article Like Report Nested if-else statements are those statements in which there is an if statement inside another if else. We use nested if-else statements when we want to implement multilayer conditions (condition inside the condition inside the condition and so on). C++ allows any number of nesting levels.Let's take a look at a simple example: C++ #include <iostream> using namespace std; int main() { int n = 6; // Outer if statement if (n % 2 == 0) { // Inner if statement if (n % 3 == 0) { cout << "Divisible by 2 and 3"; } else { cout << "Divisible by 2 but not 3"; } } else { cout << "Not Divisible by 2"; } return 0; } OutputDivisible by 2 and 3Explanation: In the above program, the outer if statement checks whether n is divisible by 2 and the inner if statement checks if n is divisible by 3. But as inner if is nested, the divisibly check with 3 is only performed if n is divisible by 2.Basic Syntax of Nested if-elseThe nesting of if-else depends on the situation but a general syntax can be defined as:if(condition1) { if(condition2) { // Statement 1 } else { // Statement 2 }}else { if(condition3) { // Statement 3 } else { // Statement 4 }}In the above syntax of nested if-else statements, the inner if-else statement is executed only if 'condition1' becomes true otherwise else statement will be executed and this same rule will be applicable for inner if-else statements.Flowchart of Nested if-else Examples of Nested if-elseThe following C++ programs demonstrate the use of nested if-else statements.Check the Greatest Among Three Numbers C++ #include <iostream> using namespace std; int main() { int a = 10, b = 2, c = 6; // Outermost if else if (a < b) { // Nested if else if (c < b) { cout << b; } else { cout << c; } } else { // Nested if else if (c < a) { cout << a; } else { cout << c; } } return 0; } Output10Check if the Given Year is a Leap YearA year is a leap year if it follows the condition, the year should be evenly divisible by 4 then the year should be evenly divisible by 100 then lastly year should evenly divisible by 400 otherwise the year is not a leap year. C++ #include <iostream> using namespace std; int main() { int year = 2023; // Outer if-else statement to check divisiblity with 0 if (year % 4 == 0) { // First nested if-else statement to check // divisiblity with 100 if (year % 100 == 0) { // Second nested if-else statement to check // divisiblity with 400 if (year % 400 == 0) { cout << year << " is a leap year."; } else { cout << year << " is not a leap year."; } } else { cout << year << " is a leap year."; } } else { cout << year << " is not a leap year."; } return 0; } Output2023 is not a leap year. Comment More infoAdvertise with us Next Article Switch Statement in C++ sagar99 Follow Improve Article Tags : C++ CPP-Control-Flow Practice Tags : CPPCPP-Control-Flow Similar Reads C++ Tutorial | Learn C++ Programming C++ is a popular programming language that was developed as an extension of the C programming language to include OOPs programming paradigm. 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