HW_Week1_Day4_StringsAndNumbers 😃

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The HomeWork has three components:

• Null safety.

• Strings.

• Numbers.

  Note: You must save your solution as solution.kt to be submitted before 9AM.

Instructions 📋

Part I - Null Safety.

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In the code below, add an if statement to the beginning of getLength that returns zero if str is null:

fun getLength(str: String?) : Int {
    // Add null check here
    
    return str.length;
}

fun main(args: Array<String>) {
  println(getLength('This is a string!'))
}

Part II - Strings.

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Write a Kotlin program to get a substring of a given string between two specified positions.

Sample Output:

old = The quick brown fox jumps over the lazy dog.
new = brown fox jumps.

Part III - Numbers.

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Write a Kotlin program to convert temperature from Fahrenheit to Celsius degree.

Input a degree in Fahrenheit: 212 Or Null

Use this equation:

C = (5 (F-32)) / 9.

Expected Output:

212.0 degree Fahrenheit is equal to 100.0 in Celsius.

Learning Resources 📚

• Null Safety in Kotlin
• Strings in Kotlin
• Numbers in kotlin