Starting Out With Visual C# (5th Edition)
Starting Out With Visual C# (5th Edition)
5th Edition
ISBN: 9780135183519
Author: Tony Gaddis
Publisher: PEARSON
Expert Solution & Answer
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Chapter 8.3, Problem 8.10CP

Explanation of Solution

IndexOf method:

  • Index of the specified string is used to find the position of the substring.
  • IndexOf method is used to find the index of a string.
  • IndexOf method returns the first occurrence of the specified char in a string.
  • If the substring that is given as an argument is found in the string, it returns the integer position of the substring’s first occurrence and if it is not found in the string, the method returns “-1”.

Example:

  //assign value to the variable

  string str= “Hello world”;

//Find the position of the given argument

  int position= str.IndexOf(“to”);

  //display the output

  MessageBox.Show(position.ToString());

Explanation:

  • Declare and assign the value to the variable.
  • Find the position of the given substring in the string.
  • Display the result in the form of message box and as the substring was not found, it displays “-1”...

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