C++ if, if...else and Nested if...else

In this tutorial, we will learn about the if...else statement to create decision making programs with the help of examples.

In computer programming, we use the if...else statement to run one block of code under certain conditions and another block of code under different conditions.

For example, assigning grades (A, B, C)
based on marks obtained by a student.

• if the percentage is above 90, assign grade A

• if the percentage is above 75, assign grade B

• if the percentage is above 65, assign grade C

There are three forms of if...else statements in C++.

1. if statement

2. if...else statement

3.if...else if...else statement

C++ if Statement
The syntax of the ifstatement is:

if (condition) {
  // body of if statement
}

The if statement evaluates the condition inside the parentheses ( ).

• If the condition evaluates to true, the code inside the body of if is executed.

• If the condition evaluates to false, the code inside the body of if is skipped.

*Note: The code inside { } is the body of the if statement.
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