How do you find the first index of a character in a string?

How do you find the first index of a character in a string?

The indexOf() method returns the position of the first occurrence of specified character(s) in a string. Tip: Use the lastIndexOf method to return the position of the last occurrence of specified character(s) in a string.

How do you find the index of a letter in a string C?

Just subtract the string address from what strchr returns: char *string = “qwerty”; char *e; int index; e = strchr(string, ‘e’); index = (int)(e – string); Note that the result is zero based, so in above example it will be 2.

How do I find the first and last index of a string?

3 Answers. You can use String. indexOf(String str) function which will return starting indexof the “CAD”. Then add one less then the length of String to find in the returned value, that will be your last character index of “CAD”.

What is the first index of a string?

Characters in a string are indexed from left to right. The index of the first character is 0 , and the index of the last character of a string called stringName is stringName. length – 1 .

How do you find the index of a character in a string in python?

Python String find() method returns the lowest index of the substring if it is found in a given string. If it is not found then it returns -1.

What is index () in C?

The index() function locates the first occurrence of c (converted to an unsigned char) in the string pointed to by string. The character c can be the NULL character (\0); the ending NULL is included in the search. The index() function is identical to strchr() — Search for character.

What is the last index in a string?

The lastIndexOf() method returns the position of the last occurrence of a specified value in a string. lastIndexOf() searches the string from the end to the beginning, but returns the index s from the beginning, starting at position 0.

What is last index?

The lastIndexOf() method returns the index within the calling String object of the last occurrence of the specified value, searching backwards from fromIndex . Returns -1 if the value is not found.