if-else to check if a character string contains a specific substring.

In R Programming Language, we can use the if-else statement to check if a character string contains a specific substring. The if-else statement allows us to execute different code blocks based on a certain condition, in this case, whether the substring is present in the given string.

if-else statement

The if-else statement is a control structure in R used to make decisions based on a given condition.

Character strings

The if-else statement is a control structure in R used to make decisions based on a given condition.

Substring

A substring is a smaller sequence of characters that appears within a larger character string.

To check if a character string contains a specific substring, follow these steps:

• Define the main character string.
• Define the substring you want to check for.
• Use the if-else statement to check if the substring is present in the main string.
• Execute different code blocks based on the presence or absence of the substring.

Let's consider a few examples to illustrate how to use the if-else statement in R to check for a specific substring.

Example 1: Checking if a string is present in the string

Output:

[1] "The string contains 'apple'."

Example 2: Checking if "mango" is present in the string

Output:

[1] "The string does not contain 'mango'."