Converting a string to uppercase can be achieved using the upcase method. It converts the characters in a string to its corresponding uppercase.
It returns the uppercase of characters in a string. If nothing gets changed, nil is returned.
str.upcase
str: This is the string whose characters we want to convert to uppercase.
Characters in string str are returned as uppercase characters.
# create some stringsstr1 = "educative"str2 = "IS"str3 = "greAT"# convert to uppercasea = str1.upcaseb = str2.upcasec = str3.upcaseputs aputs bputs c
Here is a line-by-line explanation of the above code:
Lines 2-4: We create some string variables, str1, str2 and str3, and initialize them with some values.
Lines 7-9: We convert characters in the strings to uppercase characters using the upcase method.
Lines 11-13: We print the results to the console.
As we can see in the output, all the characters in the strings are converted to uppercase characters. The only string that does not change is string str2.