How to Extract a Left Sub-String from a given string in Sage X3

By | April 20, 2017

In Sage X3, you may come across various scenarios where you need to get a sub-string from an existing string. You can derive sub-string from both the ends i.e. from the left or the right or starting from any particular position of a given string.

This blog will help you to extract the leftmost sub-string from a given string i.e. We can derive a sub-string with any number of characters from the left of the given string.

Sage X3 provides the below special function to achieve the same:

left$ (string,nb_char)

This function is used to extract a sub-string starting from the left-hand side first letter of an original string to the letter ending with specified number of characters.


string -> Original string with an alphanumeric expression
nb_char -> Numerical integer expression for the length of a string to be extracted.

Let’s consider the following example for extraction of sub-string with 4 letters from left to better understand the working of left$ function.

Kindly refer to the below snippet of code for better understanding.

Local Char YSTRING(50)
Infbox left$(YSTRING, 4)

The above snippet of code will give the output as “JACK”.

Hope this blog helps!

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