Kotlin Null Safety

What is Null Safety?

Kotlin prevents null pointer errors by handling null values safely.

Non-Nullable Variables

Nullable Variables

Safe Call Operator (?.)

Elvis Operator (?:)

Non-Null Assertion (!!)

Safe Cast (as?)

Checking for Null

Using let

Full Example

Why Null Safety is Important

• Prevents crashes
• Safer code
• Reduces bugs
• Core Kotlin feature

Common Mistakes

• Using !! too often
• Ignoring null cases
• Confusing nullable types

Practice

Create a nullable variable and safely access its value.

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