Index Function

Lesson 15 of 19 in Coddy's Functions and Pointers in Golang course.

The strings package also contains a function called Index, which returns the index of a given character in a string.

An example of how this function works:

str := "Hello, World!"
char := "o"
index := strings.Index(str, char)
fmt.Println("Index of 'o' is", index)

The function takes the string and the character (str, char). If the char exists, the function returns the index; if it doesn't exist, it returns -1.

As always, indexing starts from 0. So, in this example, the result will be:

Index of o is 4

Challenge

Easy

Let's build our Index function! 😁

Write a function called index that takes two strings and returns an integer.

The first parameter will be the string.

The second parameter will be the character that we will check.

Check if the character exists; return the index if it does, return -1 if it doesn't.

Example:

Input:

"Coddy"
"y"

Output:

Try it yourself

// Your Code Here

All lessons in Functions and Pointers in Golang

1Introduction

Introduction

4Rebuild Go Strings Functions

Strings in Golang Join Function Contains FunctionIndex FunctionRecap Challenge #1

2Pointers

What is a Pointer New Function

5Rebuild Go Slices Functions

Equals Function Length Function Recap Challenge #1

3Functions

Introduction Function Parameters Function with Return Value Value vs Reference Return Multiple Values Anonymous Functions Recap Challenge #1 Recap Challenge #2