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Answer 1

Explanation:

what is string operator ?

The function is used to format data into a string. ... The READS procedure can be used to read values from a string into IDL variables. Case Folding. The method returns a copy of the string converted to lowercase

what is conditional statement ?

Alternatively referred to as a conditional expression and conditional processing, a conditional statement is a set of rules performed if a certain condition is met. It is sometimes referred to as an If-Then statement, because IF a condition is met, THEN an action is performed.

what is list ( arrays) ?

In computer science, an array data structure, or simply an array, is a data structure consisting of a collection of elements, each identified by at least one array index or key. An array is stored such that the position of each element can be computed from its index tuple by a mathematical formula