index (x, s)

The index 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.

Example

index ("abcdabcd", "cd");	

Result: 3, c is in third position.

index ("AbCdAbcd", "cd");	

Result: 3, c is in third position. The search is case insenitive.