C++Nested If

Nested If

You can also place anif statement inside anotherif. This is called anested if statement.

A nestedif lets you check for a condition only if another condition is alreadytrue.

if (condition1) {  // code to run if condition1 is true  if (condition2) {    // code to run if both condition1 and condition2 are true  }}

Example

In this example, we first check ifx is greater than 10. If it is, we then check ify is greater than 20:

int x = 15;int y = 25;if (x > 10) {  cout << "x is greater than 10\n";  // Nested if  if (y > 20) {    cout << "y is also greater than 20\n";  }}

Real-Life Example

Nestedif statements are useful when you need to test multiple conditions that depend on each other. For example, checking if a person is old enough to vote, and if they are a citizen:

int age = 20;bool isCitizen = true;if (age >= 18) {  cout << "Old enough to vote.\n";  if (isCitizen) {    cout << "And you are a citizen, so you can vote!\n";  } else {    cout << "But you must be a citizen to vote.\n";  }} else {  cout << "Not old enough to vote.\n";}

Notes

• You can nest as manyif statements as you want, but avoid making the code too deep - it can become hard to read.
• Nestedif is often used together withelse andelse if for more complex decision making.