number pattern

print this pattern using for loop.

[FONT=&quot]1 2 3 4[/FONT]
[FONT=&quot] 5 6 7[/FONT]
[FONT=&quot] 8 9[/FONT]
[FONT=&quot] 10[/FONT]
[FONT=&quot] 10[/FONT]
[FONT=&quot] 9 8[/FONT]
[FONT=&quot] 7 6 5[/FONT]
[FONT=&quot]4 3 2 1[/FONT]

 

Easy. Where are you stuck?

 

can you figure out the last step?

Code:

#include <stdio.h>

int main(){
    int i;
    for (i=0;i<20;i++){
        if (i<10)
            printf("%d ",i+1);//straight
        else
            printf("%d ",20-i);//reverse
    }
    
    getchar();
    return 0;
}