indexOf() method in string in java.
package program;
import java.util.Scanner;
public class code
{
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("enter string=");
String s = sc.nextLine();
System.out.println("enter a character=");
char ch = sc.next().charAt(0);
int ix=-1;
for(int i=0; i<s.length(); i++){
if(ch==s.charAt(i)){
ix=i;
break;
}
}
System.out.println(ix);
}
}
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