C++ if else Statement Last Updated : 12 Dec, 2024 Comments Improve Suggest changes Like Article Like Report The if statement alone tells us that if a condition is true it will execute a block of statements and if the condition is false, it won’t. But what if we want to do something else if the condition is false. Here comes the C++ if else statement. We can use the else statement with if statement to execute a block of code when the condition is false.Let's take a look at an example: C++ #include <iostream> using namespace std; int main() { int i = 10; // If statement if (i < 15) { cout << "10 is less than 15"; } // Else statement with the above if else { cout << "10 is not less than 15"; } return 0; } Output10 is less than 15Explanation: The condition in the if block checks if 10 is less than 15. Its true so the statement inside if block, “10 is less than 15” gets printed and else block is skipped. If the condition was false, all the statements inside the if block will be skipped and else block will be executed.Syntaxif (condition) { // Executes this block if // condition is true}else { // Executes this block if // condition is false}The if statement condition can be anything that evaluates to a boolean value or a boolean converted value. We generally use relational and equality operator to specify the condition.Working of if-else statement Control falls into the if block.The flow jumps to Condition.Condition is tested.If Condition yields true, goto Step 4.If Condition yields false, goto Step 5.The if-block or the body inside the if is executed.The else block or the body inside the else is executed.Flow exits the if-else block.Flowchart of if-else in C++ Examples of if else Statement in C++The following are a few basic examples of the if-else statement that shows the use of the if-else statement in a C program.Check for Odd and Even Number C++ #include <bits/stdc++.h> using namespace std; int main() { int n = 7; // if block executed when the number is even if (n % 2 == 0) cout << "Even"; // else block executed when the number is not even else cout << "Odd"; return 0; } OutputOddYou may have noticed that we skipped using the braces for the body of the if statement. If we do not provide the curly braces ‘{‘ and ‘}’ after if( condition ) then by default if statement will consider the immediate one statement to be inside its block.Find Largest Among Three Numbers C++ #include <iostream> using namespace std; int main() { int a = 1, b = 2, c = 11; // Finding the largest by comparing using // relational operators with if-else if (a >= b) { if (a >= c) cout << a; else cout << c; } else { if (b >= c) cout << b; else cout << c; } return 0; } Output11Explanation: Finding largest element requires users to compare multiple condition. We can compare multiple conditions by nesting one condition inside other. There is also another way of combining multiple conditions.The above program can also be written by using compound expressions as: C++ #include <iostream> using namespace std; int main() { int a = 1, b = 2, c = 11; // Finding largest using compound expressions if (a >= b && a >= c) cout << a; else if (b >= a && b >= c) cout << b; else cout << c; return 0; } Output11In this code, we are grouping multiple conditions in a single if statement using logical AND operator. (&&) Comment More infoAdvertise with us Next Article C++ if else if Ladder S SanghpriyaGautam2 Follow Improve Article Tags : Misc C Language C++ Computer Science Fundamentals CPP-Basics +1 More Practice Tags : CPPMisc 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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It is used to decide whether a certain statement or block of statements will be executed or not executed based on a certain condition. Let's take a look at an example:C++#include <iostream> using namespace std; int main() { int 3 min read C++ if else StatementThe if statement alone tells us that if a condition is true it will execute a block of statements and if the condition is false, it won’t. But what if we want to do something else if the condition is false. Here comes the C++ if else statement. We can use the else statement with if statement to exec 3 min read C++ if else if LadderIn C++, the if-else-if ladder helps the user decide from among multiple options. The C++ if statements are executed from the top down. As soon as one of the conditions controlling the if is true, the statement associated with that if is executed, and the rest of the C++ else-if ladder is bypassed. I 3 min read C++ Nested if-else StatementNested 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 tak 3 min read Switch Statement in C++In C++, the switch statement is a flow control statement that is used to execute the different blocks of statements based on the value of the given expression. It is an alternative to the long if-else-if ladder which provides an easy way to execute different parts of code based on the value of the e 5 min read Jump statements in C++Jump statements are used to manipulate the flow of the program if some conditions are met. 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