Self-study Linux shell12.6-nested loops for command

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12.6-Nested loop for command

• A nested loop is a loop in which there is one loop.
• The inner loop, in the outer loop body, triggers an internal loop during each execution of the outer loop until the inner loop executes.
• How many times the outer loop executes, and how many times the inner loop is completed. Of course, the break statement for either an external loop or an inner loop interrupts the process.

Example 1:

The above program when i=1,2,3 traversal, J's Traversal

Example 2:

Example 3: Placing a For loop in the while

Example 4:until and while binding

Self-study Linux shell12.6-nested loops for command