Some common functions of go strings

Fmt. PRINTLN (Strings. ToUpper ("Hello World"))//Convert to uppercase
Fmt. PRINTLN (Strings. ToLower ("HELLO World"))//Convert to lowercase
Fmt. PRINTLN (Strings. Contains ("Hello World", "World")//find if the substring is in the specified string
Fmt. PRINTLN (Strings. Count ("Hello World", "L")//determines the number of occurrences of a character in another string
Fmt. PRINTLN (Strings. Equalfold ("Hello World", "Hello World")//Determines whether two strings are equal and is case-insensitive
Fmt. PRINTLN (Strings. Index ("Hello World", "L")//determine where the character first appears in another string

Some common functions of go strings