Ruby Basic Exercises: Create a new string where "if" is added to the front of a given string

Ruby Basic: Exercise-12 with Solution

Write a Ruby program to create a new string where "if" is added to the front of a given string. If the string already begins with "if", return the string unchanged.

Ruby Code:

def if_string(str)
    str[0, 3] == "if " ? str : "if " << str 
end
print if_string("if else"),"\n" 
print if_string("else"),"\n" 

Output:

if else
if else

Flowchart:

Ruby Code Editor:

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