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

Last update on December 21 2024 10:17:16 (UTC/GMT +8 hours)

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:

Contribute your code and comments through Disqus.

Previous: Write a Ruby program to print the following 'here document'.
Next: Write a Ruby program to create a new string from a given string using the first three characters or whatever is there if the string is less than length 3. Return n copies of the string.

• Weekly Trends and Language Statistics
• Weekly Trends and Language Statistics