C Programming :: Declarations and Initializations - Discussion

i=0 as it is static variable,for first iteration 

i=i+2 will be 0+2 =2;

i = i - j will be 2-0 = 2;

second iteration i=2

j=1;

i=i+2 will be 4

i =i-j will be 4-1 =3

third iteration i=3

j=2;

i=i+2 will be 5

i= i-j will be 5-2 =3

fourth iteration i=3

j=3;

i=i+2 will be 5

i= i-j will be 5-3 =2

fifth iteration i=2

j=4;

i=i+2 will be 4

i =i-j will be 4-4=0

sixth iteration i=0

j=5;

i=i+2 will be 2

i= i-j will be 2-5 =-3

seventh iteration i=-3

j=6;

i=i+2 will be -1

i =i-j will be -1-6 =-7

eighth iteration i=-7

j=7;

i=i+2 will be -5

i =i-j will be -5-7 =-12

ninth iteration i=-12

j=8;

i=i+2 will be -10

i =i-j will be -10-8 =-18

tenth iteration i=-18

j=9;

i=i+2 will be -16

i =i-j will be -16-9 =-25

printf("%d", i); will be -25

In static storage class by default variable will be 0

so static int i =0 (by default) and scope = till program terminates

in loop

(j=0,i=0+2=2,i=2-0=2)

(j=1,i=2+2=4,i=4-1=3)

(j=2,i=3+2=5,i=5-2=3)

(j=3,i=3+2=5,i=5-3=2)

(j=4,i=2+2=4,i=4-4=0)

(j=5,i=0+2=2,i=2-5=-3)

(j=6,i=-3+2=-1,i=-1-6=-7)

(j=7,i=-7+2=-5,i=-5-7=-12)

(j=8,i=-12+2=-10,i=-10-8=-18)

(j=9,i=-18+2=-16,i=-16-9=-25)

j=9<10 loop end 

ans is -25

can anyone help with this????