How many iterations will loops execute?

(a) for (int i = 0; i < 20; i + + ) { }

(b) for (int i = 1; i < = 20; i + + ) { }

(c) for (int i = 5; i < 20; i + + ) { }

(d) for (int i = 20; i > 0; i - - ) { }

(e) for (int i = 1; i < 20; i = i + 2) { }

(f) for (int i = 1; i < 20; i * = 2) { }

(a) 20

(b) 20

(c) 15

(d) 20

(e) 10

(f) 5

Explanation:

(a) In this loop it start from "0" and iterated up to the value of i = "19" because there is 1 increment in each iteration i. e (i++) so total iterations will executed 20.

(b) In this loop it starts from "1" and iterated up to the value of i="20" because there is 1 increment in each iteration i. e (i++) so total iterations will executed 20.

(c) In this loop it start from "5" and iterated up to the value of i = "19" because their is 1 increment in each iteration i. e (i++) so total iterations will executed 15.

(d) In this loop, it starts from "20" and iterated up to the value of i = "1" because there is 1 decrement in each iteration i. e (i--) so total iterations will execute 20.

(e) In this loop, it starts from "1" and iterated up to the value of i="19" because there is 2 increment in each iteration i. e (i=i+2) so total iterations will execute 10.

(f) In this loop, it starts from "1" and iterated up to the value of i = "19" because there is twice the increment of value of i=i*2 so total iterations will executed 5