index (x, s)

The index(x, s) function searches for the first occurrence of the string s in x.

It returns the index of the first character of the occurrence or 0 if the string s did not occur in x.

The search is case-insensitive.

This function returns a value of type Number.

Examples

 index ("abcdabcd", "cd");

Result: 3.

 index ("AbCdAbcd", "cd");

Result: 3. Note that the search is case-insensitive.