# 
#  The `on` keyword

In Dart, the **`on` keyword** is used with the `try` block when we have a certain type of exception to catch.

# 
## Syntax

---
```
try {
// some code here
}
on exception_type {
// some code here
}
```

##
## Code

The following code shows how to use the `on` keyword in Dart:


void main() {
  try {
    // declare variable x and y
    int x = 5, y;
    y = x ~/ 0;
  }

  on IntegerDivisionByZeroException {
    print("Error: Zero division");
  }
}

## Explanation

- Lines 1–12: We create the `main()` function.
- Line 2: We wrap the code within a `try` block to catch any error.
- Line 4: In `main()`, we declare two variables of int type, `x = 5` and `y`. 
- Line 5: We assign the result from the computation `(x~/0)` to `y`.
- Line 8: We use `on`  to specify the exception type that occurs.

How to use the on keyword in Dart

Catch specific exceptions in Dart using the `on` keyword within a `try` block.

How to use the on keyword in Dart

The on keyword

Syntax

Code

Explanation

The `on` keyword