Option Strict On: The Option Strict On statement is used to prevent the data loss in the implicit type conversion. If one data type value is converted to a narrower data type, then smaller number or number with fewer precision data loss is occurred in the implicit conversion. For example, Consider the statement Dim intValue As Integer = 18.36 Here, the double value is converted as integer number and stored into the memory location. In the implicit conversion, the value is rounded off by the nearest whole number and the decimal portions are removed. At the final result, the number is stored as 18, so the decimal part .36 is removed from the number. Here, the data loss has been occurred. If the Option Strict is On, then it will not allow the implicit conversion; it raises a warning while the program tries to perform an implicit conversion. When the Option Strict is on, it does not allow the following conversions: String to number implicit conversion is not allowed. Number to string implicit conversion is not allowed. Wider data types to narrower data types implicit conversion is not allowed. Implicitly narrower data types are promoted as wider data types.

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Chapter 3, Problem 4MQ6

Program Plan Intro

Option Strict On:

The Option Strict On statement is used to prevent the data loss in the implicit type conversion.

If one data type value is converted to a narrower data type, then smaller number or number with fewer precision data loss is occurred in the implicit conversion.

For example,

Consider the statement Dim intValue As Integer = 18.36

Here, the double value is converted as integer number and stored into the memory location.

In the implicit conversion, the value is rounded off by the nearest whole number and the decimal portions are removed.

At the final result, the number is stored as 18, so the decimal part .36 is removed from the number. Here, the data loss has been occurred.

If the Option Strict is On, then it will not allow the implicit conversion; it raises a warning while the program tries to perform an implicit conversion.

When the Option Strict is on, it does not allow the following conversions:

String to number implicit conversion is not allowed.

Number to string implicit conversion is not allowed.

Wider data types to narrower data types implicit conversion is not allowed.

Implicitly narrower data types are promoted as wider data types.

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