Data commit

Task/Identity-matrix/ZX-Spectrum-Basic/identity-matrix.basic

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+10 INPUT "Matrix size: ";size
+20 GO SUB 200: REM Identity matrix
+30 FOR r=1 TO size
+40 FOR c=1 TO size
+50 LET s$=CHR$ 13
+60 IF c<size THEN LET s$=" "
+70 PRINT i(r,c);s$;
+80 NEXT c
+90 NEXT r
+100 STOP
+200 REM Identity matrix size
+220 DIM i(size,size)
+230 FOR i=1 TO size
+240 LET i(i,i)=1
+250 NEXT i
+260 RETURN